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420chan is Getting Overhauled - Changelog/Bug Report/Request Thread (Updated June 12 [TaimaTV Update])
Evidence of Life on Mars? Ignore Report View Thread Reply
Edward Pickering - Mon, 25 Mar 2019 07:04:17 EST ID:sojeXM9D No.57606
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http://journalofastrobiology.com/Mars5.html
37 posts and 10 images omitted. Click View Thread to read.
>>
Joseph-Louis Lagrange - Mon, 17 Jun 2019 11:52:15 EST ID:HUBAqrsF No.57747 Ignore Report Reply
>>57745

dog = wolf re: social hierarchies is a common misconception and canine research disproves the whole alpha theory
>>
A_Wizard !cMZsY.BCnU!!vVWR8L52 - Mon, 17 Jun 2019 14:15:30 EST ID:9YXtXzja No.57748 Ignore Report Reply
>>57747
Dogs are not originally descended from wolves, though had interbred with them at times. Only eskimo dogs are true wolf dogs, and huskies and malamutes don't even recognize proper dogs as their own species, nor do they have the same or remotely similar patterns of vocalization. DYOR, you really need to.
>>
Bernhard Schmidt - Tue, 18 Jun 2019 10:45:41 EST ID:HUBAqrsF No.57749 Ignore Report Reply
>>57748

you are stupid. your post about the pyramids being electric power plants was full of evolution denial. i thought you were banned anyway


WTF is up with barred spirals? Ignore Report View Thread Reply
Jan Hendrik Oort - Sat, 23 Mar 2019 22:16:58 EST ID:aGo2dCNY No.57596
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Why did all of the material in those two spiral arms lose all of their angular momentum and head for the core at the same time? I bet those two hard right turns those arms tax are separated by 15-20kpc. Since so many galaxies do this, whatever is happening to this one must be pretty common.
Also check out all those galaxies buried in the background, there must be some kinda awesome galaxy cluster back there.
10 posts and 3 images omitted. Click View Thread to read.
>>
John Bahcall - Tue, 21 May 2019 17:02:19 EST ID:457vC2+I No.57724 Ignore Report Reply
>>57716
>>Why are you so positive that the Hubble constant isn't just an observational effect?
I'm not positive, except about the fact that I nor anyone else really knows. I'm positive I don't know that whether or not it's an observational effect, just like I'm positive no one else knows either.
>>maybe its all just in your imagination.
Well, no, because it's an empirically measurable effect. There must be some physical explanation for that phenomena. Also, the WMAP doesn't exist in my imagination, so there must be some explanation for its data, even if it turns out not to be LCDM.
>>Why is it a constant anyway?
Cause that's what we call a figure in an equation that apparently has a 'constant' value. If hubble's constant truly has a fluctuating value, it would require major refinements to hubble's law and the rest of physics.
>>Shouldn't it be variable over time?
Well, maybe. That's certainly what the present data suggest, but since we don't understand the mechanism of that change, we don't know if it's a real phenomena or, like you suggest, an observational effect. So we simply can't know with the data we have.
>>Maybe the universe is static, but there are expanding and contacting parts and we happen to be in an expanding part at the moment, but in 3 billion years maybe the sky will look different?
Yeah, maybe, man. But how are we gonna test that idea? You see how that is the real root of the problem?
>>
Henrietta Levitt - Sun, 26 May 2019 09:09:02 EST ID:HUBAqrsF No.57729 Ignore Report Reply
on one hand it follows pretty commonly observed magnetic field line patterns, on the other isnt there a supermassive black hole at the center of most galaxies?
>>
A_Wizard !cMZsY.BCnU!!vVWR8L52 - Sun, 16 Jun 2019 15:28:59 EST ID:9YXtXzja No.57746 Ignore Report Reply
>>57724
>because I don't know, nobody does!
You've clearly fallen for the same logical fallacy of the agnostics.


Building Blocks of Life Found on Mars Ignore Report View Thread Reply
Otto Struve - Thu, 07 Jun 2018 19:12:35 EST ID:eygzYfFg No.57290
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https://news.nationalgeographic.com/2018/06/mars-organic-compounds-methane-curiosity-space-science/

>Two landmark discoveries reveal organic carbon on the red planet, shaping the future hunt for life on Mars.

I'm scared guys. This could mean life is common in the universe, which means the Great Filter is ahead of us instead of behind us.

😰😰😰😰😰

Then again, maybe this can show us the Great Filter is already behind us but when it comes to cosmic horror, I'm a half-empty kinda guy.
42 posts and 6 images omitted. Click View Thread to read.
>>
Arthur Eddington - Tue, 28 May 2019 20:01:49 EST ID:ay76ZdB1 No.57732 Ignore Report Reply
the pvc dildos in my closet will last at least ten thousand years
>>
Vera Rubiin - Fri, 07 Jun 2019 15:04:05 EST ID:izGRJ+VN No.57738 Ignore Report Reply
>>57731
Even in the case there will be evidence in the geological records.
A layer unusually high concentration of iron compounds and scattered refined metals everywhere. Evidence of mining on the layers below.
I can't come up with a complete list but I've seen somebody do it, perhaps I'll find that again.
In the case of "turn the entire crust into a molten fireball" of course life itself would vanish and the atmosphere would be heated so much that it would be blown away into space.
This would paradoxically make it easier to preserve evidence of our civilization since stuff can't oxidize.

This doesn't mean a large enough chuck couln't do it though. With enough kinetic energy the upper crust could evaporate too and be blown away into space.
It would have to be an extra-solar object though since we are pretty much certain nothing of that magnitude is around as far as we can see.
>>
A_Wizard !cMZsY.BCnU!!vVWR8L52 - Sun, 16 Jun 2019 15:24:42 EST ID:9YXtXzja No.57744 Ignore Report Reply
>>57290
We've pretty thoroughly contaminated it already though. Considering that even the exterior of the space stations have microbial life on them, and how impossible it is to irradicate every spore and microbe, the red planet is likely already colonised with lichens, puffballs, and extremophile bacteria. It's going to be a long hard journey to determine if the life we find on mars had existed before our modern arrival, unless we manage to find more complex life forms than bacteria and fungi.


dark matter & string theory Ignore Report View Thread Reply
Irwin Shapiro - Sun, 24 Mar 2019 17:45:09 EST ID:DGSw25sg No.57599
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lets talk about it.
29 posts and 7 images omitted. Click View Thread to read.
>>
William Huggins - Wed, 12 Jun 2019 14:46:55 EST ID:+G8ef2Iy No.57741 Ignore Report Reply
>>57740
resonant*
>>
Edward Barnard - Thu, 13 Jun 2019 21:38:46 EST ID:f/Tl+D5o No.57742 Ignore Report Reply
After meeting our god I asked about women and he sent me traveling outside to where their creational black crystal resides. I got to know them, then after some time, both collectives let me as a male, and a female from their's, to travel to the central black hole where people reside to learn and get to know everyone. The behavior from the opposite female was so vibrant I couldn't let her near me until her mind was less flippant, so I created a string between us she had to travel up before meeting me. It almost choked her assertive behavior until she understood where I was and we met up the right way.
>>
Johannes Kepler - Sun, 16 Jun 2019 13:11:48 EST ID:NrYIi9kp No.57743 Ignore Report Reply
>>57742
I did this once but I got a urinary tract infection


1999 kw4 nudes Ignore Report View Thread Reply
Edwin Hubble - Sun, 26 May 2019 09:40:23 EST ID:vMi3XH8F No.57730
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You guys got any close up pics of 1999 kw4? It just sailed by last night over the US. Or was this whole thing just a meme to fuel Doomsday threads on every Chan?
>>
James Randi - Wed, 29 May 2019 08:08:24 EST ID:O+m7uDGO No.57733 Ignore Report Reply
>>57730
https://www.youtube.com/watch?v=uv8wbeOTJk4


Fermi Paradox... why? Ignore Report View Thread Reply
Henrietta Levitt - Thu, 22 May 2014 00:54:34 EST ID:ILYTISHs No.53812
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Another thread made me start thinking about this. The Fermi Paradox states (thanks, Wikipedia):

>The Sun is a young star. There are billions of stars in the galaxy that are billions of years older;
>Some of these stars probably have Earth-like planets which, if the Earth is typical, may develop intelligent life;
>Presumably, some of these civilizations will develop interstellar travel, a technology Earth is investigating even now, such as that used in the proposed 100 Year Starship;
>At any practical pace of interstellar travel, the galaxy can be completely colonized in a few tens of millions of years.

If that's the case, why haven't we been colonized already, or at least seen evidence of intelligent life somewhere in our galaxy?

My take: either A) Life takes a long time to develop, and somehow, improbably, we're the first planet to develop an intelligent civilization in our galaxy, or at least one of the first. We don't see anyone else because there isn't anyone else to see... yet, or we're all still too far apart.

Or b) Given the size and composition constraints of a planet able to foster and sustain life (as far as we know, "habitable zone," big enough to have an atmosphere, small enough to still be rocky, etc.) and continue long enough for said life to begin to explore the galaxy, the home planet simply runs out of resources before meaningful headway can be made. I think this is more of a slow-death kind of thing where maybe we get to do some exploration within the solar system and maybe a bit beyond for a while, but overpopulation, war, disease, famine, and whatever else causes us to realign our priorities from space exploration to merely sustaining life on our own planet. A civilization that had the foresight to know something like that was happening could theoretically, if they had the goal of galactic expansion from the start, avoid this situation, but the problem is that NO civilization has that kind of 10,000 year plan from the get-go, and they all sputter out right before they could have pulled it off. There's not a textbook on "how to succeed as a species" that gets handed out to a life form when it develops self-awareness, so following the natural progression, they all fail. the ability to extract resources necessary for galactic colonization from anywhere off-planet becomes viable too late in the game to save the species.

tl;dr - We're all gonna die, prolly. Thoughts?
333 posts and 79 images omitted. Click View Thread to read.
>>
John Bahcall - Tue, 21 May 2019 17:15:20 EST ID:457vC2+I No.57725 Ignore Report Reply
>>57722
Well, obviously Dyson spheres are hugely speculative. No one ever posited them as a serious engineering project, but there's still a lot of usefulness to the idea and a civilization that was close to the level of being able to achieve it would probably be able to see a lot more of its inherent utility.
>>Are you planning to just move your whole civilization to live on the outside of the sphere?
Presumably, any civilization advanced enough to do with would be non-biological, but the original idea was for human-like life. If the radius of the sphere is the same as the radius of earth's orbit, then surface radiation on the sphere would be the same as on earth (provided it had the same sorts of electromagnetic barriers) so there's no reason biologics couldn't live on the inner surface.
>>Simply the energy involved in building the stupid fucking thing would outstrip to a large degree the practical utility you'd ever likely get out of it.
Well, a civilization that had materials with the necessary tensile strength almost certainly has advanced nanotechnology, which would allow construction of anything at pretty much the bargain-basement level of energy cost. Also, such a thing would only be built by a civilization with an extremely long-term perspective. It would probably take hundreds of thousands of years to build the thing, but any civilization that could do that certainly would have the wherewithal to operate it for perhaps millions of years, which would certainly see a large energy ROI.
>>It'd make more sense to create reactions with anti-particles or some form of energy we don't even know about yet
That would be awesome, but what if it turns out there isn't anything else? Nature isn't obliged to continually provide us with more and more efficient forms of energy. On that note:
>>more efficiently breaking down and converting matter to energy at the quantum level.
That's what a star already does. It may turn out that there really is no more efficient way to do it than with trillions of gigatons of mass crashing down on each other, in which case a Dyson sphere is one of the optimal types of 'matter-energy conversion reactor power generators.'
>>will have one giant world spanning piece of fabric to harness all the world's wind energy.
And yet wind energy is now a more important part of the energy budget of our civilization than ever. People from hundreds of years ago didn't have the knowledge to figure out how, but they did have enough to figure out that there was something to get there. We're in a similar position, and likewise most of our ideas about total star energy collection would look pretty foolish to a civilization that could actually do it. But it doesn't invalidate the underlying idea that was really Dyson's innovation; that we know there is a something-to-get there now, and we can use the principles of engineering to incrementally figure out how to get it.
>>
Viktor Ambartsumian - Wed, 22 May 2019 19:03:30 EST ID:izGRJ+VN No.57726 Ignore Report Reply
>>57722
>Seeing people talk about Dyson spheres reminds me of a bunch of 17th century pseudo-intellectuals talking about theoretical highly advanced civilizations that can achieve the level of harvesting all the wind in the world to power their sails, and then some fools wandering around thinking that in the future someone will have one giant world spanning piece of fabric to harness all the world's wind energy.

That's a funny analogy but it's flawed and you know it. In contrast to the analogy (which to my knowledge was never actually proposed ever) building a dyson swarm is not only feasible but requires no high tech, just persistence.

Also a dyson swarm isn't something you aim to build, it's something you end up with. Think of a dyson swarm not as something like the great wall of china, but Shenzen, NYC or Tokyo.
You continue to build space habitats and build them in an orbit that lets you get enough energy to run them. And there are plenty of reasons of why to use solar energy in space even if you have fusion.
>>
Viktor Ambartsumian - Wed, 22 May 2019 19:18:17 EST ID:izGRJ+VN No.57727 Ignore Report Reply
>>57725
>That's what a star already does. It may turn out that there really is no more efficient way to do it than with trillions of gigatons of mass crashing down on each other, in which case a Dyson sphere is one of the optimal types of 'matter-energy conversion reactor power generators.'

Interestingly enough a star is quite inefficient when it comes to matter/energy conversion. Only a fraction of a percent is actually converted to energy.
The even is a theoretical (in terms of proposed in actual science) energy source we know of that would beat fusion by a long shot:
Black holes:
You essentially need a black hole large enough that you can feed it and small enough that you can conceivably build space habitats around it's orbit.
Then you'll shot matter at it, a little above tangential to it's event horizon. The matter will spiral around it and during process will heat up from simple friction against itself. It will heat up so much that the light it gives off (note it's still above the event horizon) that is becomes a significant mass fraction of the matter itself.
It is said to reach a matter to energy conversion efficiency of around 40%.
I suppose the bulk of the energy would be x-rays but then I doubt we would have any problem capturing that when we are at that point.
https://www.youtube.com/watch?v=t-O-Qdh7VvQ


zOMG it spins! Ignore Report View Thread Reply
Caroline Herschel - Thu, 21 Mar 2019 02:08:39 EST ID:aGo2dCNY No.57582
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lets say you were somewhat nearby a rapidly rotating neutron star such that the star's diameter was a significant portion of the distance from the star. Would the star's effective center of gravity be offset towards the approaching limb because of the relative velocities and redshifts of the approaching side versus the retreating one?
If its real, how significant would the effect be? Does the effect imply that the gravity well isn't symmetrical?
8 posts and 2 images omitted. Click View Thread to read.
>>
Jacob Kapteyn - Mon, 01 Apr 2019 23:40:44 EST ID:aGo2dCNY No.57626 Ignore Report Reply
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>>57620
>>
Russel Hulse - Tue, 14 May 2019 06:34:48 EST ID:MDsFoX52 No.57701 Ignore Report Reply
>>57591
But gravity isn't spherical.
>>
William Hartmann - Tue, 14 May 2019 17:38:07 EST ID:457vC2+I No.57702 Ignore Report Reply
>>57701
Mhm. That's why I said
>>We model gravity based around a sphere with a radius...
>> ...but this is a simplification


Black hole sun Won't you come And wash away the rain Black hole sun Won't you come Won't you come Ignore Report View Thread Reply
Henry Draper - Wed, 10 Apr 2019 10:40:58 EST ID:eygzYfFg No.57629
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These absolutely crazy mofos did it.

https://www.bbc.com/news/science-environment-47873592

They took a picture of the universe's asshole. WTF mate, the amount of data they had to collect is just mindboggling.
24 posts and 4 images omitted. Click View Thread to read.
>>
Nicolaus Copernicus - Thu, 09 May 2019 04:08:03 EST ID:PkLJZC5m No.57688 Ignore Report Reply
>>57683
Maybe because it isn't saturn and it's 50 million light years away?
>>
Tadashi Nakajima - Thu, 09 May 2019 16:55:29 EST ID:kZncG2o1 No.57691 Ignore Report Reply
>>57688
Don’t use such big numbers I still get scared from getting too emotional
>>
George Airy - Tue, 14 May 2019 06:23:12 EST ID:PkLJZC5m No.57700 Ignore Report Reply
>>57691
wat?


Space is genuinely terrifying and I love it. Ignore Report View Thread Reply
James Randi - Tue, 05 Mar 2019 08:35:50 EST ID:CxvjOUYt No.57550
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I was listening to an episode of "The last podcast on the left". They were talking about the WOW signal.
If you aren't familiar LPOTL is a bit like coast to coast AM but hosted by some guys who are actual skeptics and fun. So some of this may not be accurate but its fun to think about.

They were saying that if it was anything intelligent broadcasting that we only got a snippit of the message because at the time scans of the sky were limited to rotation of the earth (they used the number 72 seconds but i have a feeling that was an approximation), then later when the location of the signals point of origin was found it was a region of space with no stars or really any thing at all.

The hosts speculated also if it was intelligent due it being in that really empty place in space and then we never saw it there again, it's likely the sender were simply in transit some where and we picked up some distant comunicqae of a "passing ship i nthe night".


although its like 900% more likley to be random noise or a misinterpreted signal from earth/[%]
Thats so wonderful and creepy at the same time.
It gets my dick rock hard
8 posts omitted. Click View Thread to read.
>>
Kiyotsugu Hirayama - Tue, 30 Apr 2019 10:21:16 EST ID:oHQwJ+8C No.57663 Ignore Report Reply
>>57642
I agree
>>
Alan Guth - Tue, 07 May 2019 00:53:29 EST ID:VXVyTSl5 No.57680 Ignore Report Reply
>>57550
might be drugs but I am pretty dang sure in the existence of alien life after seeing three circular pods bending spacetime. Lol drugs
>>
James Randi - Sat, 11 May 2019 16:38:32 EST ID:BtqvtkKp No.57697 Ignore Report Reply
>>57642
I am sure some one has.


NSFW PICS ITT Ignore Report View Thread Reply
Joseph Lockyer - Mon, 25 Mar 2019 00:14:59 EST ID:aGo2dCNY No.57605
File: 1553487299164.jpg -(913441B / 892.03KB, 1027x1027) Thumbnail displayed, click image for full size. 913441
galaxies fucking
>>
Edwin Salpeter - Wed, 27 Mar 2019 20:02:57 EST ID:WgUmKU+A No.57619 Ignore Report Reply
>>57605
doggystyle, I like it
>>
Karl von Weizsacker - Thu, 28 Mar 2019 16:43:59 EST ID:izGRJ+VN No.57622 Ignore Report Reply
> passing through each other several times and eventually merging into a massive spherical orb

seems epic doesn't it?
>>
Allan Sandage - Thu, 28 Mar 2019 18:11:33 EST ID:3VIsfVg3 No.57623 Ignore Report Reply
>>57622
HNNNG say that again slut


high redshift mirrors Ignore Report View Thread Reply
Grote Reuber - Wed, 06 Mar 2019 13:31:08 EST ID:wIGiff+l No.57553
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lets say you were able to place a mirror in space out at such a distance that the mirror experience cosmological redshift from your perspective. If you were to shoot a laser beam of some wavelength at the mirror then the light reflecting off the mirror would be a longer wavelength than the originating laser because of the relativistic doppler effect.
what wavelength would the light be when it got back to you after bouncing off the mirror? would it be the original wavelength or would it be redshifted?
if its not the original wavelength then how was energy conserved?
7 posts omitted. Click View Thread to read.
>>
Friedrich von Struve - Tue, 19 Mar 2019 07:34:25 EST ID:izGRJ+VN No.57577 Ignore Report Reply
>>57575
I don't think there is any information lost from redshift. It's the underlying space that is expanded during redshit, not the lightwave itself.
If you are in a reference frame that negates that expansion, you get exactly the "original" wavelength.

So I think this "relativistic reference frame" telescope would theoretically work.
There are some practical considerations though:
Pointing a telescope in the direction of travel means it is exposed to all the interstellar dust.
So you maybe need a vanguard of other ships that absorb it so it doesn't wreck you instruments.
Apart from that I think we could actually calculate if it's feasible to move that fast at all, drag of the interstellar medium becomes significant once you hit a considerable fraction of c.
>>
Charles Bolton - Tue, 19 Mar 2019 19:11:02 EST ID:457vC2+I No.57578 Ignore Report Reply
>>57577
In star trek sci fi shows they use electromagnetic fields to control interstellar dust. Could it be simple as ionizing the telescope? Also, though it would negate some of the benefits of having a large aperture to observe large wavelengths, if the telescope was quite small it might be possible for it to exist entirely within the bowshock of a forward facing shield. Would limit its field of view, but directly forward objects might not be the ideal candidates anyway because of the blueshift thing.
>>
Paul Goldsmith - Wed, 20 Mar 2019 05:55:06 EST ID:4o5sH+7r No.57579 Ignore Report Reply
>>57577
>Pointing a telescope in the direction of travel means it is exposed to all the interstellar dust.
destroy everything in your path using the power of relativistic beaming


Cartoons are not proof of reality. NASA is lying to you. Locked Ignore Report View Thread Reply
Annie Cannon - Thu, 07 Mar 2019 04:07:18 EST ID:IqZLNWNv No.57557
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>Look at every post on this page.
ALL CGI and CARTOONS, no real images of Earth or anything from over 100 miles high. BIG RED FLAG.

>NASA and affiliated agencies have not been to space.
>Nobody has ever been over 100 miles high.
>Physics demonstrates to us that's as high as anything can go - which is why all images from over 100 miles up, are CARTOONS.
IT ain't rocket science ya know...


>The implication here, is that you were lied to as a child by government agencies and told you lived on a ball shaped Earth with no exit... A prison planet.
>You were born into a Jew run slave labor colony, and fed bullshit as you grew up.
It is not your fault.
>Jesus and God are not real. Evolution is bullshit, Globe Earth is a cartoon, and the Big Bang theory was created by a catholic priest.

If you are a science minded person, understand the ball shaped potato Earth is not real, it is bullshit, and does not exist in the real world outside of bogus math equations and cartoons.
Locked
Thread has been locked
Thread was locked by: Mintzs
Reason: please take stupid conspiracy theories to /tinfoil/
8 posts and 8 images omitted. Click View Thread to read.
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Annie Cannon - Thu, 07 Mar 2019 04:23:56 EST ID:IqZLNWNv No.57566 Ignore Report Reply
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>Great channel to learn about the REAL Earth you live upon.
>Science only. Pure science.

https://www.youtube.com/watch?v=R8EdDxyNqmg
>>
Annie Cannon - Thu, 07 Mar 2019 04:25:35 EST ID:IqZLNWNv No.57567 Ignore Report Reply
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http://www.atlanteanconspiracy.com/2015/08/200-proofs-earth-is-not-spinning-ball.html

>200 Proofs Earth is not a spinning ball.
>>
Annie Cannon - Thu, 07 Mar 2019 04:27:52 EST ID:IqZLNWNv No.57568 Ignore Report Reply
1551950872680.jpg -(191330B / 186.85KB, 960x742) Thumbnail displayed, click image for full size.
>Quoting “Heaven and Earth” by Gabrielle Henriet.
“If flying had been invented at the time of Copernicus, there is no doubt that he would have soon realized that his contention regarding the rotation of the earth was wrong, on account of the relation existing between the speed of an aircraft and that of the earth’s rotation.

If the earth rotates, as it is said, at 1,000 miles an hour, and a plane flies in the same direction at only 500 miles, it is obvious that its place of destination will be farther removed every minute.

On the other hand, if flying took place in the direction opposite to that of the rotation, a distance of 1,500 miles would be covered in one hour, instead of 500, since the speed of the rotation is to be added to that of the plane.

It could also be pointed out that such a flying speed of 1,000 miles an hour, which is supposed to be that of the earth’s rotation, has recently been achieved, so that an aircraft flying at this rate in the same direction as that of the rotation could not cover any ground at all.

It would remain suspended in mid-air over the spot from which it took off, since both speeds are equal.”


Gravitons Ignore Report View Thread Reply
George Gamow - Thu, 21 Feb 2019 04:17:57 EST ID:5UfVWq6v No.57539
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While we were all out I was wondering about gravitons. If they're analogues of photons in a sense then gravitons should exist in a spectrum like photons, etc. Our ability to manipulate and understand the photon is pretty miraculous, but how would something like a prism for gravitons work? Prisms function with light because the speed of light in the medium is different than it is outside, what is there that could change the speed of a graviton or reflect it?
4 posts and 2 images omitted. Click View Thread to read.
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George Gamow - Fri, 01 Mar 2019 15:11:37 EST ID:457vC2+I No.57547 Ignore Report Reply
>>57546
You're pointing out the intellectual poverty on a meta-theoretic level of standard cosmology, and I think for some people that's so obvious as to not need statement, but most rank-and-file academics and science-literate people are still wholly convinced that LCDM has everything figured out, which is why we're stuck where we are. I think the reason you're seeing such a marked uptick in hangwringing over LCDM in the literature is precisely because the 'average' physicist has been exposed to these realities long enough to realize just how little ground they cover, and for just how long science is willing to wander into blind alleys, and are now figuring out how to communicate that to the faithful masses. Actually making a fundamental revolution in theory on the order you're suggesting (something that could recontextualize relativity) would create a shockwave in world affairs just as severe as Einstein's discovery did. So I would suggest it's not just that science has become dogmatic, or that scientists and people in general are buried under waves of distraction (which were all, incidentally, made possible by the scientific breakthroughs of the previous generation) but that the broader socio-cultural conditions aren't favorable to another drastic change. There are plenty of people who have alternative concepts, but it isn't in the zeitgeist to take them seriously, especially during the process of the breakdown of the current zeitgeist whose intellectual foundations lie in the previous wave of discovery.

So what I'm really saying is, wait 20 years. Breakthrough does not come out of comfort and distraction, it comes out of strife on the edge of oblivion. Einstein came up with relativity in a filthy trench under artillery bombardment -- and don't think that European academia's willingness to jettison the luminiferous aether in the face of relativity had nothing to do with national spirits broken by adherence to the previous centuries' failed philosophies and perspectives.

Democritus came up with the atom and Alexander of Hero came up with the steam engine thousands of years before either would become accepted and used, and not because of any particular flaw in their inventions, but because the broader social conditions were not favorable to an intellectual/cultural revolution at that time. So it is now for any bright physicist trying to find the holes in the standard model; only just now is the bulk of the science responding to the reality that a few luminaries could probably have told you in 1950: we're heading into a dead end. In 20 years a new generation will have come up with the failure of LCDM as their base view, and the time might be right for a change.

One last thing--
>>maybe the mass is emitting space.
Would this be observationally different than a curved space? Not saying you're wrong, but maybe you're just expressing a different way of verbalizing the exact same concept. If there is 'more' space in the same volume of space (the distance between point A and an egg and point A and a neutron star the size of the egg are the same, so a sphere with their centers at its circumference would have the same volume regardless of either's mass) then how could 'space' fit more 'space' in itself other than by curling it up/curving it? In fact I think that's a pretty succinct way of describing what's going on with gravity.
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Thomas Henderson - Sat, 02 Mar 2019 02:52:25 EST ID:aGo2dCNY No.57549 Ignore Report Reply
>>57547
All of what your wrote about societal unwillingness to accept new discoveries rings true even if does seem so stupid. Greeks could've had steamships, but they were already satisfied with what they had? Oh well, too bad for them I guess.
The Wright brother's invention wasn't acknowledged by the general public until years after they'd been flying.

The idea of space or time being created beyond the event horizon must be a retarded alternative explanation for the apparent expansion of the universe given that it takes place beyond the event horizon, I just pulled that one of out my ass when I was wondering what happens at the bottom of a gravity well when it changes from being part of the curvature to the XYZ plane into being a hole with sides that are nearly or eventually perpendicular to the XYZ plane.
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Tycho Brahe - Mon, 20 May 2019 15:32:11 EST ID:9YXtXzja No.57712 Ignore Report Reply
>>57539
There is no such thing as a graviton.


Sagittarius Dwarf Galaxy: Home? Ignore Report View Thread Reply
Arthur Eddington - Fri, 19 Oct 2018 18:25:45 EST ID:457vC2+I No.57470
File: 1539987945247.jpg -(20518B / 20.04KB, 485x313) Thumbnail displayed, click image for full size. 20518
>>original article
http://viewzone.com/milkyway.html
>>rebuttal
http://blogs.discovermagazine.com/badastronomy/2007/06/27/is-the-sun-from-another-galaxy/#.W8pUPmhKiUk

Quick rundown of the findings, which are earth-shattering if fully true, and still quite interesting if only partially true: our galaxy is orbited by a smaller spheroidal dwarf galaxy currently visible within the constellation Sagittarius. For hundreds of millions of years, it has been orbiting in a perpendicular orbit after having been pulled into the Milky Way's gravity, having stars pulled off of it each time it passes through the galactic disk, to the point now where it is very small, faint, and nearly at the point of losing gravitational cohesion. You can see a visualization of the stream of radiation left by the galaxy astronomers used to determine its path in the pic.

Now this is where it gets interesting.

It just so happens that Sol is directly within this stream of debris. For 99.9% of our orbit around the galaxy, we wouldn't be within that stream. Also, incidentally, we are at an angle to the plane of the galaxy, which was always thought a little bit odd, since most stars planetary orbital plane is parallel to the galactic plane since during accretion their accretion disks are subject to inertial forces from the star's orbit around the galaxy.

Given the extreme odds of us just happening to be within that stream, it would seem to suggest that Sol itself is native to the dwarf, having been pulled out on the dwarf's last passage through the galactic plane.

Implications:
-The period of the dwarf's orbit is around 200 million years. It is roughly 25% of the way through its orbit counting from our position in the galactic plane, which means we would have been caught by the Milky Way about 50 million years ago. The last time we passed through the plane before that, presumably still gravitationally bound to the dwarf, would have been 150 million years ago.
-Incidentally, these numbers roughly coincide with major extinction events on earth, presumably because the gravitational disruption of passing through the galactic plane would disturb the Oort cloud and send high levels of asteroids into the inner system.
-If this is true, the Drake equation is completely bunk, since we have assumed that earth was native to the Milky Way in making our estimates about life.
-Radiation levels in the dwarf are much, much lower than in the Milky Way. If this true, that means life developed on our planet under a condition of much lower radiation than we are currently experiencing. I don't need to tell you life and radiation don't get along, so this is a startling finding about the long-term future of life on earth (and indeed in the galaxy at large) if true.
-Higher galactic radiation would increase mean solar radiation, increasing damage to DNA among other effects. This could explain the sudden rise of mammals, as their more robust homeostatic systems could perhaps better deal with the heat increase. This would also explain why all the planets in the solar system -- not just earth -- are experiencing climatic shifts in a hotter direction before you get your panties in a bunch, we're talking about a period of warming that has been going on for at least 50 million+ years. It can't be used to explain anthropogenic climate change, which is still real

Problems:
-While I don't find the rebuttal wholly convincing (its argument about the plane of the solar system is misleading at best, as well as its argument about where we should find ourselves relative to the ring of debris -- at the very least, it's not the slam-dunk debunk the author tries to pretend it is) it does bring up the problem of the lower general metallicity of the dwarf galaxy's stars. However, we can't really estimate what the stellar population of the dwarf was when it first arrived, since so many stars have already been stripped off, so this doesn't tell us as much as you would think.

What are your thoughts /sagan/? Big if true, fascinating if false, or a bunch a bunk?
23 posts and 6 images omitted. Click View Thread to read.
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Edwin Hubble - Sun, 24 Feb 2019 05:52:39 EST ID:U4u72hWB No.57541 Ignore Report Reply
1551005559017.jpg -(562908B / 549.71KB, 1593x1080) Thumbnail displayed, click image for full size.
>>57470
uneducated pleb here. would it be a good idea to strive for escaping back to the drawf galaxy assuming out system came from there? If this galaxy has higher radiation than that dwarf galaxy which supposedly we evolved from. 150 million years or so i the estimate for the transit that's with in our line of evolution isn't it? Then should we worry about an inevitable dead end in ou evolution or would we acclimate? Maybe escaping this galaxy would be a good idea esp if the fermi paradox is thrown right out the window giving the conditions here, who knows what the fuck lives here. But I'm more interested in our basic survival odds, not counting for the clockwork mass destruction events.

This some sci fi shit my dudes.
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Bernard Burke - Mon, 25 Feb 2019 19:19:08 EST ID:457vC2+I No.57542 Ignore Report Reply
>>57541
These are all unknowns, however the suggestion I made in OP was that mammals kind of are life's 'adaptation' to the current environment. But I mean, if we're going to survive in the galaxy long term, being biological organisms prone to radiation makes us vulnerable in lots of other ways too. So it's best just to fix that.
Besides, the level of tech we would need to migrate to the dwarf is way higher than the level of tech we (or any other aliens) would need to become machines, so if this galaxy is indeed fatal to organic life, most civilizations would converge on that as the optimal solution I think.
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Johann Bode - Sat, 16 Mar 2019 20:38:40 EST ID:rNBxnMOH No.57573 Ignore Report Reply
>>57541
OP's post sounds like a bunch of absolute hogwash and I cannot find any other sources for it than his own link which literally discusses things like bigfoot alongside this.
>Then should we worry about an inevitable dead end in ou evolution or would we acclimate?
No because we are currently living in a man made mass extinction event already caused in part but not entirely by climate change (the rest of the mass extinction is due to numerous other factors of human activity like 7 billion hungry mouths stripping the ocean of all sea life, completely eradicating entire species by hunting them to extinction like the Wooly Mammoth, and numerous factors from our reckless massively polluting and sharply expanding urban civilization). The amount of destruction on a global scale reminds me of a bacterial sheet. The human organism became out of whack and overcolonized its own petri dish. I think the current stage in humanity is ample evidence that intelligent technological civilizations are unlikely to ever be found because in the few instances where it happened it likely destroyed itself either wiping out the civilization or outright sterilizing much of the planet, and that is assuming these societies didn't do something really stupid like knock themselves out of orbit careening into the sun, creating a massive enough singularity to swallow their planet whole before evaporating, or any number of other scenarios in which case the actual planet itself no longer exists.

But as for now, what happens in millions of years is pretty fucking irrelevant to us when we're talking about things like climate change moving us towards ecological and societal collapse within the next hundred or two hundred years.


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