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420chan is Getting Overhauled - Changelog/Bug Report/Request Thread (Updated July 26)

fate of universe

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- Sun, 14 Sep 2014 23:31:05 EST SknUZfy5 No.54393
File: 1410751865116.jpg -(810494B / 791.50KB, 1400x907) Thumbnail displayed, click image for full size. fate of universe
Is there a theory that says that eventually the universe will expand so large that it will collapse in on itself and create another big bang?

What are your thoughts on the fate of the universe?

"The Last Question" by Isaac Asimov is a short story about the fate of mankind and the universe. Idk if everyone on this has read it or not, but I love it. Here's the link: http://www.multivax.com/last_question.html
43 posts and 6 images omitted. Click View Thread to read.
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Charles Messier - Tue, 04 Sep 2018 11:45:13 EST 457vC2+I No.57444 Reply
>>57443
I'll help Lemaitre out by saying the first two statements are uncontroversial possibilities thoroughly discussed ITT. The first is the Big Freeze, Heat Death, leading to a Big Rip: https://en.wikipedia.org/wiki/Big_Rip
The second is the Big Crunch, which is now thought to be impossible under current observations but was popular in the 20th C.: https://en.wikipedia.org/wiki/Big_Crunch

As for the third I have no idea what he's alluding to and I'm really interested also.
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Johannes Kepler - Sat, 22 Sep 2018 19:46:39 EST kahFeNFq No.57452 Reply
>>57442
>Woah what? Who thinks that?
people trying to unify quantum mechanics and general relativity into a single theory

do you try to quantize gravity or do you try to gravitize quanta?
do you treat quantum entanglement as tiny wormhole?
do you treat blackhole as the entropy surface?
could geometry of space be determined by level of entanglement in quantum foam in a region of space?
could dimensionality of space be an emergent property of quantum mechanics?

>I know relating the the dimensions of space is that one that suggested that 3 dimensions of space and 1 of time was the only logically possible one, that all other kinds of universes would be literally impossible. I don't agree with that idea but it seems like people have given up on making a rigorous theory of the relationship between the dimensions (or assume GR's spacetime covers it.)

try incorporate probabilities into dimensions of space

does the "literally impossible" part come from encountering infinity and divide by zero with utilizing earlier understanding of mathematics?
>>
Chushiro Hayashi - Sun, 23 Sep 2018 00:01:29 EST 457vC2+I No.57453 Reply
>>57452
>>does the "literally impossible" part come from encountering infinity and divide by zero with utilizing earlier understanding of mathematics?
Perhaps, it is more like the image suggests; it's a suggestion about the topology of spacetime and whether causality or space could be consistent with that number of dimensions. However, it's equally likely that all those other possible coordinates could also have universes like ours, in which the mathematics equally suggest that only their dimensional composition is possible and all others impossible.

How does a closed

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- Mon, 16 Jul 2018 20:31:55 EST 4+cG6NBX No.57348
File: 1531787515505.jpg -(85295B / 83.30KB, 1125x1111) Thumbnail displayed, click image for full size. How does a closed
Timeline curve work? Could you be trapped in it forever ?
I have a writing prompt
>>
Stephen Hawking - Tue, 17 Jul 2018 00:04:28 EST 457vC2+I No.57349 Reply
1531800268505.png -(130973B / 127.90KB, 431x393) Thumbnail displayed, click image for full size.
Closed timelike curves are totally theoretical objects -- we have no real information about how they would work, or if they are even possible. Essentially, what is 'curved' in a CTC is the 'geodesic' of spacetime. What this means that, for example, if you had a geodesic curvature in space at a 45 degree angle and you fired a laser beam into that space, as it entered it the beam within it would appear to you (if you could see it reflected) as if it had bent at that same angle even though it encountered no object. In a 'closed' timelike curve, remembering that space and time are a continuum, if the curvature is so extreme that it forms a torus, i.e. loops back on itself, and one traversed the distortion in the (normally flat i.e. euclidean) curved spacetime, one could end up at the end of passing through the distortion at the same point in space, but an earlier point in time.

If you were stuck on it would depend on how you got into such an unusual object in the first place. If the geodesic torus could only be made so small, so that in order to traverse it one had to travel at relativistic speeds, the degree of time distortion could be amplified. Also, it's possible that actual matter (rather than energy) trapped within a CTC could become inertially unbound, so there might be no way to stop a spacecraft (for example) that was travelling through one, trapping its crew on an eternal voyage into the past (or future, depending on the 'direction' the geodesic is distorted in the fourth dimension.)

Anyway, a lot of people will not see any time travel story as 'hard sci-fi' so you probably have a lot of leeway. Hawking famously believed that a CTC would destroy itself in a cosmological version of the grandfather paradox, as heat from the torus' relative future would propagate backwards in time, eventually creating a thermal singularity that would destroy it.
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Annie Cannon - Sat, 15 Sep 2018 13:46:07 EST yzfSDg8q No.57446 Reply
Theoretically, you cease to exist in the timestream as soon as you get in the box, while your time-travelling double (who left the box at some point in the past) continues along the timestream as normal and never gets back in the box. In theory.

moon

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- Thu, 31 May 2018 10:35:24 EST HhkM3rED No.57285
File: 1527777324976.jpg -(2143958B / 2.04MB, 2580x2452) Thumbnail displayed, click image for full size. moon
Does the moon really have influence on behavior? Or is it a well loved myth?
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Stephen Hawking - Tue, 17 Jul 2018 00:22:10 EST 457vC2+I No.57350 Reply
1531801330505.jpg -(174176B / 170.09KB, 754x1070) Thumbnail displayed, click image for full size.
>>57346
I think I'll play it safe and leave it at that for here. Took the meta topic (of skeptical illuminism) to /spooky/ like you suggested, to expand it a bit beyond simply astrology. See ya there anyone who is still interested!
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Jericho !.iRAtomic2 - Wed, 22 Aug 2018 00:13:41 EST qgHixtEA No.57436 Reply
>>57285
So, as a general skeptic of anything that can't be scientifically proven, I never actually believed in this.

Until I started working with people with developmental disabilities.

For whatever reason, the day after full moons, behaviors in clients would spike drastically. Most of the times that I was attacked, bitten, had my hair pulled, was the first day after a full moon. My personal belief was that this may simply be a function of the increased amount of light at night, with my reasoning being that it kept people up more at night, especially those who were sensory sensitive. As irritability is a common side effect of lack of sleep, this would lead to clients being more sensitive to stimuli that might upset them. Obviously, this is all anecdotal, but I think it deserves to be said. I actually have data on attacks and behaviors from one client who required close recordkeeping, but have yet to compare this data to full moons. However, I do know that at least a few times, the night was completely overcast. Perhaps enough light filters through the clouds to support my theory of light interfering with sleep, but I really couldn't say without having actually measured the amount of moonlight on a nightly basis. And if it was solely a question of light, why didn't these behaviors occur in a smooth curve as the moon waxed and waned, instead of tending to occur all at once, the day after the full moon?

I really don't know. I wish I had answers, because it would have helped me out a lot in my last job.
>>
Edmond Halley - Wed, 22 Aug 2018 15:08:12 EST 457vC2+I No.57437 Reply
>>57436
How could it really be the light though, since humans have been exposed to a huge amount of additional light thanks to artificial lighting and no one has gone crazy? There would have to be something special about light coming from the moon, which is even a more woo-woo direction to go in that assuming it has something to do with the tides or magnetism.

Lakes of liquid water found on Mars

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- Thu, 26 Jul 2018 15:44:03 EST CZNpyEE2 No.57358
File: 1532634243590.jpg -(3262171B / 3.11MB, 5333x3333) Thumbnail displayed, click image for full size. Lakes of liquid water found on Mars
Ground-penetrating radar images of the southern polar cap of Mars taken by ESA's Mars Express suggest the presence of liquid water 1.5 km beneath the surface. As pure liquid water probably cannot exist at such a shallow depth and low temperature, the research team posits that the water is a brine with salts and perchlorates that dramatically lower its freezing point. The largest discovered aquifer is 20 km wide, but its thickness cannot be accurately estimated. The water reservoirs would take the form of salty brine pools beneath the mile of layered ice and dust, or the water might be a component of thicker brine-dirt sludge, mixed with Martian regolith.

http://www.sciencemag.org/news/2018/07/liquid-water-spied-deep-below-polar-ice-cap-mars
http://science.sciencemag.org/content/early/2018/07/24/science.aar7268

Astronomical data

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- Fri, 29 Jun 2018 13:36:57 EST BPHCgbLm No.57327
File: 1530293817601.jpg -(138469B / 135.22KB, 1200x1200) Thumbnail displayed, click image for full size. Astronomical data
I had an idea to build a digital astronomical clock for fun in unity as a learning exercise. It would include solar system clock showing the "time" and such on various planets and a 3rd model of the solar system.
I'd like to try aim for a bit of realism and have the models of planets be in accurate locations to real life.
What would be the best source for finding out planet locations so that they don't all start in the 12 oclock position when I start my program?
Like if I added Mars, how do I find how far into its solar year (month?) It currently is on Mars?

I'm new to coding in general, I already have the data for earth but that's done simply by telling the program to check the system clock and moves the model of earth to right orientation.
6 posts omitted. Click View Thread to read.
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James Randi - Fri, 06 Jul 2018 20:46:11 EST CxvjOUYt No.57340 Reply
any links to some sort of table would be helpful too

images

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- Fri, 29 Jun 2018 11:49:29 EST vxFcQ9yD No.57323
File: 1530287369168.jpg -(3086272B / 2.94MB, 7680x4320) Thumbnail displayed, click image for full size. images
Since this is an imageboard, let's post space related images.
1 posts and 1 images omitted. Click View Thread to read.
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Vera Rubiin - Sat, 07 Jul 2018 18:30:41 EST fjAVn7KX No.57341 Reply
1531002641478.gif -(2398469B / 2.29MB, 640x480) Thumbnail displayed, click image for full size.
DICKS EVERYWHERE

Astronomical Illusion - Earth is the center of the universe

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- Tue, 19 Jun 2018 17:15:11 EST 6aIwEr35 No.57311
File: 1529442911009.jpg -(342372B / 334.35KB, 1920x1080) Thumbnail displayed, click image for full size. Astronomical Illusion - Earth is the center of the universe
Hello!

This is from a video series I saw long ago and it described a general illusion that is responsible for the Earth being seen as the center of the universe.

Like they say that in a few million/billion years the sky is going to be completely dark because the stars are moving away from us. But this is just an illusion from our vantage point. We're also moving away from them but we can't see it, only visualize it.


The way I remembered in the video was very clever and simple.

It was like rows and columns of 4 dots:

. . . .
. . . .
. . . .
. . . .

And it had like a clear paper with one dot in the middle. And as the transparent paper moved, the dot moved relative to the stationary background and you could see how the center of the dot in the transparent paper stayed stationary as the rest moved away.

I'm probably not explaining it right because even that doesn't make sense to me but maybe it's enough to go on for one of you out there
1 posts omitted. Click View Thread to read.
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Thomas Henderson - Wed, 20 Jun 2018 10:08:09 EST 6aIwEr35 No.57313 Reply
>>57312

Thanks for the explanation but the illusion I was referring to was the fact that astronomers before would always postulate that Earth was the center of everything (that is, stationary) and everything else is moving away or moving around us.

But in reality, Earth is moving as well and isn't actually stationary.

The illusion is that Earth is just used as a stationary anchor point for our perspective because we need a relatively stable point to base our calculations on. Like the same way we arbitrarily chose the weigh of a kilogram and now use that to conceptualize weight relative to one another.

But because of modern technology, we can visualize the universe more conceptually without putting Earth at the center.
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Henry Draper - Wed, 20 Jun 2018 22:42:36 EST 457vC2+I No.57314 Reply
1529548956888.jpg -(111795B / 109.17KB, 1280x720) Thumbnail displayed, click image for full size.
>>57313
Astronomers certainly are aware of the motion of our solar system and account for it in their calculations when it is relevant, including calculations of expansion and redshift. I agree I wish popularly available star charts included depictions of the direction of motion and speed of stars so people can visualize what is going on better, but if, as a matter of principle, we stop using earth as the reference point, over time they will become off center with the physical hubble volume, the universe-lifetime light sphere of earth, which is obviously centered here. Once we are an interplanetary species, we will obviously need new definitions, and for most practical purposes the difference won't matter much.

How would you feel about using the center of the galaxy (either its gravitational center or the supermassive blackhole Sag A*) as our reference center point? That wouldn't differ too much from our visible observations, and seems the most convenient.
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Annie Cannon - Wed, 27 Jun 2018 15:30:26 EST 6aIwEr35 No.57319 Reply
>>57314

I'm not against using Earth or whatever as a reference.

I was just intrigued by the natural phenomena that we see ourselves as the center of things when it's a fallacy of perception. And I remember the same phenomena existed in astronomy until the copernican revolution

Hey

Locked View Thread Reply
- Fri, 25 May 2018 04:39:48 EST eiFhhu/4 No.57283
File: 1527237588460.jpg -(368926B / 360.28KB, 720x1280) Thumbnail displayed, click image for full size. Hey
Check this mother ****** out.
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Kiyotsugu Hirayama - Sat, 26 May 2018 13:15:33 EST 10X7g+Qi No.57284 Reply
1527354933221.jpg -(2595730B / 2.48MB, 2448x3264) Thumbnail displayed, click image for full size.
Whoay thread. I'm going to be working all day and maybe into the night. Hope i produce something increadible!

Stephen Hawking died at age 76

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- Wed, 14 Mar 2018 03:52:46 EST UgaLEhyB No.57237
File: 1521013966541.jpg -(203302B / 198.54KB, 1160x629) Thumbnail displayed, click image for full size. Stephen Hawking died at age 76
Goodnight you genius retard
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William Hartmann - Wed, 14 Mar 2018 09:04:12 EST eygzYfFg No.57238 Reply
His absurd in-mental astrophysics simulations will be missed. Rest in peace dude, you deserve it.
>>
Thomas Henderson - Wed, 14 Mar 2018 11:22:05 EST sL8p9E02 No.57239 Reply
RIP to the coolest dude.
>>
William Fowler - Fri, 13 Apr 2018 19:43:23 EST Iarb3bdT No.57277 Reply
You were a remote-controlled animatronic silicone muppet for decades, but a pretty good mascot and an excellent rapper.

Fucking ECLIPSE thread!

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- Sun, 20 Aug 2017 15:50:15 EST KgS57XEk No.57006
File: 1503258615031.jpg -(263261B / 257.09KB, 1932x1932) Thumbnail displayed, click image for full size. Fucking ECLIPSE thread!
ECLIPSE THREAD MOFOS!

Come on! Get excited for this!

I got a cheap solar filter sheet and put it in front of my 300mm lens. Which is plugged into a 2x teleconverter. 600mm to grab the eclipse.

Took some test shots today and got to see some sunspots! Which are freaking cool (well, RELATIVELY cool...LOL!)

Post eclipse shit here people!
6 posts and 1 images omitted. Click View Thread to read.

Intergalactic Electromagnetism

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- Sun, 18 Feb 2018 06:53:57 EST tC4KRASE No.57199
File: 1518954837151.gif -(2096340B / 2.00MB, 400x354) Thumbnail displayed, click image for full size. Intergalactic Electromagnetism
Hey /sagan/,

Quick question for y'all. Currently we observe the universe to be expanding at an accelerating rate and no equations can account for the force behind this since all scientists tend to be looking at gravity alone. However, the electromagnetic force is something like 30 orders of magnitude stronger than gravity, and has the same inverse relationship to the square of the distance between the objects, meaning even at vast cosmic distances it should still be relevant, in fact MORE relevant, than gravity.

Maybe instead of "dark energy" it is simply the electromagnetic repulsion between galaxies who all gained like charges through the big bang or whatever and they simply move apart like two protons would?

Has this theory been debunked or seriously investigated?
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Karl Jansky - Thu, 01 Mar 2018 22:21:30 EST PAGBpgJc No.57220 Reply
1519960890192.gif -(747912B / 730.38KB, 300x244) Thumbnail displayed, click image for full size.
>>57199
Inflation theory doesn't say that stuff in the universe is moving away from each other, rather that the space-time where the stuff resides is expanding, giving the red shifted appearance of most celestial objects. I'm not sure where you got the gravity thing from, as it's not really coming into play.
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Thomas Henderson - Fri, 16 Mar 2018 01:30:53 EST eygzYfFg No.57240 Reply
Place your bets dudes and dudettes.

Dark energy is:
1) something we haven't discovered yet
2) an error in our understanding of physics
3) cthulhu ftaghn ia ia ia ia tekeli

Red Dwarf ayy lmaos

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- Mon, 15 Jan 2018 13:34:12 EST y3vStdZD No.57154
File: 1516041252879.jpg -(66050B / 64.50KB, 1024x768) Thumbnail displayed, click image for full size. Red Dwarf ayy lmaos
In this thread ITT we discuss the habitability of red dwarf systems
Scientists have theorized that these planets could be habitable despite being tidally locked with their stars. They believe there would be enough convection between the light and dark sides to maintain oceans, an atmosphere etc.
I think it would be interesting how life would evolve on such a world, particularly intelligent life. Imagine how the material conditions of the world would affect culture, technological development, geopolitics etc.
https://en.wikipedia.org/wiki/Habitability_of_red_dwarf_systems
Discuss
10 posts omitted. Click View Thread to read.
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Charles Bolton - Tue, 13 Feb 2018 12:18:11 EST 4uIlxD// No.57190 Reply
>>57154

I feel like if life developed on any planet it would spread and adapt to all envitonments.

Imagine a planet with three wildly divergent patterns, in the hot, twilight, and dark sides.

Any intelligent ayyylmaos would want to access resources from the other zones, the technology and methods developed to survive and colonize the opposite side of their planet would translate well to space travel. The history of the conquest of their own planet would be fascinating.

What would it do to a society to have half the planet living in hostile conditions?

What if two separate races descended from entirely different trunks of an evolutionary tree that branched in the microbial era became sapient separately, isolated from each other by their wildly different environments?
>>
Charles Bolton - Tue, 13 Feb 2018 12:30:08 EST 4uIlxD// No.57191 Reply
>>57167
Jupiter has a magnetic field from its metallic hydrogen core. Gas giant's have moons big enough to hold an atmosphere, and the tidal forces from orbiting close to a gas giant have been observed to create geologic and weather activity.

Could Jupiter sized gas giant's exist close enough to a gas dwarf to be warm enough to evolve life? Would the magnetic field of such a hypothetical gas giant protect its moons?

Earth life hates radiation because it denatures proteins, a fundamental structure in all earth life, Earth life even uses proteins to store the information that makes evolution possible.

Are there any classes of molecules capable of the kind of structural and interactive diversity of proteins that aren't as vulnerable to radiation?
>>
Viktor Ambartsumian - Thu, 15 Feb 2018 03:10:20 EST m3P6k9jA No.57193 Reply
1518682220337.gif -(45588B / 44.52KB, 640x452) Thumbnail displayed, click image for full size.
>>57191
>Earth life hates radiation because it denatures proteins, a fundamental structure in all earth life
In the beginning, it hated oxygen because it oxidized proteins. It's not inconceivable that carbon-based life in in an environment with ionizing radiation could adapt to mitigate the damage and use the energy.
https://en.wikipedia.org/wiki/Radiotrophic_fungus

>Are there any classes of molecules capable of the kind of structural and interactive diversity of proteins that aren't as vulnerable to radiation?
All molecules are, under a few feet of water.

Private Space Industry can now reach Mars.

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- Tue, 06 Feb 2018 17:11:41 EST unNII3om No.57169
File: 1517955101747.jpg -(14848B / 14.50KB, 153x258) Thumbnail displayed, click image for full size. Private Space Industry can now reach Mars.
The Falcon Heavy launch was a success. There's a Tesla car now in transfer orbit to Mars, and this is a fact. Beyond how absurd that sounds, this actually means that a private actor now has the capability to put orbiters and more around Mars. Which means a huge step closer to putting people on the world.

Space-X has provien that they at least has the capability to reach the un-told numbers of asteroids passing through that range.
Is this Musk's actual end-game here? To capture some metal-heavy asteroid and bring it into low-Earth orbit for mining? I dunno, but still, the future is getting tangible as fuck.
8 posts and 2 images omitted. Click View Thread to read.
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Harlow Shapley - Thu, 08 Feb 2018 17:18:49 EST p73EfNkl No.57179 Reply
>>57177

the point of heavy is the recovery of the boosters (although the 3rd one did crash so more work needs to be done)
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Hannes Alven - Thu, 08 Feb 2018 19:31:02 EST NyLhIW/E No.57181 Reply
>>57177
But that's not the point of the Falcon Heavy, it was to become the largest lift capacity commercial rocket presently operated...which it now is. You'll have to wait until later this year for them to surpass the Saturn V with the Big Fucking Rocket, which absolutely could redo Apollo. (Also, imagine how much lighter we could make a modern Apollo mission with current materials and tech.)
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William Herschel - Fri, 09 Feb 2018 23:52:48 EST coC9H9eG No.57183 Reply
1518238368620.gif -(1620911B / 1.55MB, 654x360) Thumbnail displayed, click image for full size.
Starman is definitely a construction android.

That bell under the car sure had a lot of room for secret gear.

Mars is a hologram: we already live on Mars. Earth is long dead.

Juno Close-Up of Jupiter

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- Sat, 16 Dec 2017 14:49:08 EST unNII3om No.57129
File: 1513453748388.jpg -(117513B / 114.76KB, 1041x586) Thumbnail displayed, click image for full size. Juno Close-Up of Jupiter
https://www.nasa.gov/mission_pages/juno/images/index.html

These pictures alone are worth the 1 billion dollars of the mission.

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