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Time dilation and the Alcubierre drive

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- Thu, 30 Jul 2015 12:30:55 EST /fL15l2I No.55567
File: 1438273855753.jpg -(16840B / 16.45KB, 200x303) Thumbnail displayed, click image for full size. Time dilation and the Alcubierre drive
if one were traveling above c in a ship using an Alcubierre drive, would they experience time dilation?
as i understand it, the object affected by the drive isn't moving but rather space is simply expanding and contracting around it. the object has no velocity and isn't moving in the normal sense.
>>
Karl Swarzchild - Thu, 30 Jul 2015 13:05:05 EST lHGvTKQL No.55568 Reply
>>55567
No, because the entire ship is contained within it's own stationary spacetime bubble.

The negative time generated by dilation will only speed up the journey relatively to the speed of light.

Stephen Hawking - Aliens

View Thread Reply
- Wed, 22 Jul 2015 09:52:58 EST eZ452btZ No.55537
File: 1437573178193.gif -(145178B / 141.78KB, 250x250) Thumbnail displayed, click image for full size. Stephen Hawking - Aliens
Discuss

http://m.space.com/29999-stephen-hawking-intelligent-alien-life-danger.html

http://news.bbc.co.uk/2/hi/8642558.stm
7 posts and 4 images omitted. Click View Thread to read.
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Alan Guth - Wed, 22 Jul 2015 16:29:07 EST YHjXylC8 No.55545 Reply
1437596947747.png -(60177B / 58.77KB, 740x391) Thumbnail displayed, click image for full size.
>>55543
>the stars we observe every night are already dead.
Unless you're using a telescope to look at galaxies very far away, they're all within a hundred thousand light years and probably aren't dead.

>>55544
Pic related is a much better explanation for UFOs.
>>
Johann Bode - Wed, 22 Jul 2015 17:08:26 EST 415JX8nG No.55547 Reply
>>55545
Hahaha that's awesome.
It would be an interesting statistic to see how the numbers change from populations with lots of alien cultural references to others were it's less prevalent, and how it changes with the scientific education levels of the respective populations effect the out come as well.

I've seen one ufo, it was probably a meteor, about twice the size of the full moon, comparable color and brightness, but it didn't have a tail and it flew right over me. I've seen large (good fraction of the full moon size) meteors before, and the big ones still had tails, but maybe it was a simple perspective issue, as the ones I saw with tails were all on the horizon. It still scared me though and I'm a super tough guy whose not afraid of anything

MFW

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- Thu, 16 Jul 2015 05:52:22 EST LD9WXxz6 No.55518
File: 1437040342119.jpg -(144755B / 141.36KB, 459x403) Thumbnail displayed, click image for full size. MFW
I realize we will never set it for ourselves.
8 posts and 1 images omitted. Click View Thread to read.
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Alan Guth - Wed, 22 Jul 2015 08:35:39 EST YHjXylC8 No.55536 Reply
1437568539747.jpg -(1097252B / 1.05MB, 2400x2290) Thumbnail displayed, click image for full size.
>>55534
Yeah, but we're really far away too. If we were closer (and blocked out light from other sources, we see dim objects near very bright objects by covering up the bright object), some structures would be brighter, to an extent.
But nebulae are so big and diffuse they've be invisible up close. The face of OP's unicorn is about a light year long.

The IAU currently does not recognize space-unicorn as an alternative to light-year.
>>
William Huggins - Wed, 22 Jul 2015 16:49:15 EST rIYomINL No.55546 Reply
>>55534
That doesn't mean they aren't real or aren't visible light.
>>
Irwin Shapiro - Thu, 23 Jul 2015 00:48:39 EST OXINl/7g No.55549 Reply
>>55546
They're definitely *real*, but they're not as visible as the photos make them appear. Most of those awesome nebula photos are long exposures, yes, but they're also composites of infrared, x-ray, and visible light, with some coloration and hue/contrast added to make them "pop." It's a real thing in the photo, but it's not the "natural" way it looks.

the sun has fallen down

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- Tue, 16 Jun 2015 22:13:13 EST fhuRENSe No.55412
File: 1434507193485.png -(22297B / 21.77KB, 411x411) Thumbnail displayed, click image for full size. the sun has fallen down
what would happen to the earth and the rest of the pack in the system if suddenly the sun dissapeared? how quickly would the planet freeze?
6 posts and 2 images omitted. Click View Thread to read.
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Thomas Gold - Wed, 15 Jul 2015 23:13:49 EST 415JX8nG No.55517 Reply
>>55416
If my imagination is allowed to run wild, I would put the earth in orbit around Jupiter, close enough to cause a decent amount of geologic activity and keep some sort of an atmosphere, even if it's toxic and much less dense than ours is today.

The center piece of civilization would probably be fusion/fission nuclear reactors, we could mine hydrogen from Jupiter. But we would need manufacturing hubs, mines, and genetically modified plants in vertical farms. I think it might be best to put residential areas around hydrothermal vents. But the other stuff will probably need to be above ground

Gentlemen...

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- Tue, 14 Jul 2015 22:24:03 EST lHGvTKQL No.55511
File: 1436927043339.jpg -(10788B / 10.54KB, 512x480) Thumbnail displayed, click image for full size. Gentlemen...
BEHOLD!

The mission was a success.

We have a picture of Pluto now.
5 posts and 2 images omitted. Click View Thread to read.
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Pierre-Simon Laplace - Fri, 17 Jul 2015 14:53:48 EST P+fSJ1RL No.55520 Reply
>>55514
I love that they call it Mordor. It so perfectly marks the time table of our exploration beyond our world. All planets in our system maintain old Latin names of old gods and deities. Now one holds a name from almost 100 years ago and has a region photographed and named Mordor.

Wonder if we find any other sneaky moons around the Jovians what will the names be?
>>
Pierre-Simon Laplace - Fri, 17 Jul 2015 14:55:42 EST P+fSJ1RL No.55521 Reply
>>55520
derp charon has mordor and was discovered only just back in 78. Didn't mordor exist in tolkiens books by then? What ever still impressed by the difference in names in system based on time discovered. nb
>>
Alan Guth - Fri, 17 Jul 2015 20:19:27 EST okoywjgZ No.55524 Reply
1437178767194.jpg -(30206B / 29.50KB, 636x318) Thumbnail displayed, click image for full size.
>>55520
I hope it becomes official some day, it also fits the underworld theme the IAU wants

Here's a map of Pluto with names suggested by NASA


Venus and Jupiter June 2015

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- Sun, 21 Jun 2015 23:01:02 EST Mx4j4tsI No.55436
File: 1434942062578.jpg -(34158B / 33.36KB, 560x475) Thumbnail displayed, click image for full size. Venus and Jupiter June 2015
The best view in northern hemisphere for June, and not ONE thread about it?
Where are all my Venus and Jupiter observers at?
15 posts and 7 images omitted. Click View Thread to read.
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Chushiro Hayashi - Sun, 28 Jun 2015 17:16:18 EST jOF47H5F No.55465 Reply
>>55464
>He stole his data from Tycho.

In the end that's ultimately what he had to do, but you're conveniently disregarding everything he went through up until that point. Maybe you should read up about the man some time.
>>
Karl Jansky - Fri, 03 Jul 2015 18:44:29 EST 0TqljQT/ No.55467 Reply
>>55465
No. He didn't have to do anything, he chose to. Just as you chose to neglect the fact his data was stolen and accuse me of ignoring history. Pot? Black?
Personal difficulty does not change the facts, Kepler was brilliant but the data was stolen.

And no the sentence "the universe is a high-dimensional object constantly rotating within itself" isn't going to cause anyone to stumble onto some new cosmology, it's so vague it doesn't many anything, it's technobabble.
>>
Tadashi Nakajima - Thu, 06 Apr 2017 14:34:06 EST S0k+HZwt No.56907 Reply
>>55467

Yes, some things you morally HAVE to do(would you watch your significant other (or self) be tortured over and over again, while unbound and free with a cell phone? No you'd be compelled to do something different, or your guilty of doing nothing when a huge injustice is being done(injustice is an open ended term I know) and you can do something about it... Or guilty of being a sadist/masochist.

The shape of Galaxies.

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- Sun, 14 Jun 2015 00:27:54 EST kfQx+w9j No.55402
File: 1434256074283.jpg -(638900B / 623.93KB, 1920x1200) Thumbnail displayed, click image for full size. The shape of Galaxies.
So if I'm correct, every galaxy has a supermassive black hole at the center of it. Every galaxy was once an active Quasar and then cooled after the black hole at the center of the galaxy spewed and consumed all the matter around it. So if a black hole has angular momentum at the center of a galaxy, does that mean the galaxy would result in a spiral shape? And would non rotating black holes instead form more of an irregular galaxy shape? I'm thinking in terms of galaxy evolution and the various shapes different galaxies take. Cheers.
11 posts and 4 images omitted. Click View Thread to read.
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Roger Penrose - Sun, 28 Jun 2015 09:38:23 EST IQY0YtFB No.55461 Reply
Eventually the spiral forms take shape of malicious code and Avira antivirus will detect them as false positives, You should try a Linux Distro, OP.
Just sayin'
>>
Kiyotsugu Hirayama - Sun, 28 Jun 2015 14:38:04 EST L3OB90Tk No.55463 Reply
>>55441
>>55446

You're both sort of right. Before major mergers when galaxies shave a lot of gas and are actively forming stars most of the big ones are spirals, some of the small ones can be irregular bit that's a different story. Left to it's on devices a spiral will not evolve or normalise into an elliptical.

A major merger is when two roughly equally sized galaxies collide and merger. It is believed elliptical form major mergers of spirals. As part of this merger the gas is usually stripped out and star formation shuts down with nothing to make stars out of (After the merger is finished). When it reaches a steady state it will be an elliptical, it will not evolve back into a spiral. The reason ellipticals have older stars is because they don't form any new ones, the oldest stars in each galaxy will not be significantly older or younger than the other.

>>55431

Frame dragging is a tiny effect, it doesn't affect things like that.

Aw Shit

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- Wed, 17 Jun 2015 17:51:11 EST KlwZpL5U No.55418
File: 1434577871926.jpg -(325142B / 317.52KB, 650x488) Thumbnail displayed, click image for full size. Aw Shit
I just started work at MIT, working on the Transiting Exoplanet Survey Satellite [TESS] program. Ask me stuff about space & shit, I can answer it for you.
7 posts and 2 images omitted. Click View Thread to read.
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Fred Hoyle - Fri, 19 Jun 2015 06:44:57 EST YHjXylC8 No.55426 Reply
1434710697724.png -(795268B / 776.63KB, 1259x696) Thumbnail displayed, click image for full size.
Do you feel the current method of detecting planets in the habitable zone is exhaustive enough to extrapolate an upper bound on how frequently rocky planets where water exists in all three phases occur, at least for certain classes of stars?

Also, did you get a cool mission patch?
>>
William Herschel - Fri, 19 Jun 2015 22:26:23 EST KlwZpL5U No.55427 Reply
>>55426
Good question!
This mission is designed to find candidate star systems for follow up observation by more sophisticated telescopes, like the JWST or GMT. What this means is that our mission is to simply characterize and catalogue as many candidate systems as possible. After speaking with a professor on the program yesterday, he explained that simulations of one year of operation showed a potential catologue of up to 75 earth mass exoplanets, up to 150 between earth and Neptune mass, and more in the Jupiter size class.
However, These candidates are going to be in orbit around the best candidate stars for water to exist, namely red dwarfs and smaller main sequence stars. It is hard to say which ones could have all three phases. At least what TESS can tell you is the mass, period, and a brief sniff of the atmosphere (if you subtract the star spectra before a transit from the spectra during a transit, you get a vague idea of the atmosphere composition).

Alas I have not gotten my patch yet. I'm hoping to score a TESS patch and a CHANDRA patch, cause that's' another one of our missions.
>>
William Herschel - Fri, 19 Jun 2015 22:27:25 EST KlwZpL5U No.55428 Reply
I'm also on my phone, so, sorry for the wall of text with no format.

BOINC

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!3mB4iDBpWw - Sun, 24 May 2015 00:38:44 EST kiOQuM9F No.55362
File: 1432442324237.jpg -(460601B / 449.81KB, 1170x778) Thumbnail displayed, click image for full size. BOINC
Hey all

I just got a new video card and decided to fire up the old BOINC to see how it stacks up to the old ones I had. At the zenith of my BOINC days I had x2 5970's doing 4 workunits, one for each GPU, every 1:30-2:00 minutes each. This 7990 that I just got is doing 2 workunits in 12 seconds for the easy ones and 30 seconds for the longer ones, but they have them mixed in with each other. So in the time it took to draw a 3d map of the cosmos in one unit for my old setup if I only counted one card, my new one is doing the work of just over 4 of my old cards in the same amount of time.

Is there still any interest in this now that Bitcoin shit the bed finally? We can start using our unused CPU and GPU cycles again for science if you want to join the team, we have teams for most of the major projects, Rosetta, Milkyway, Primegrid, etc.
>>
George Gamow - Tue, 26 May 2015 09:03:53 EST 0IM2ydyR No.55370 Reply
>>55362
I should stop being lazy and get into this now that you've reminded me.
>>
INTERPOL !3mB4iDBpWw - Wed, 27 May 2015 23:09:31 EST kiOQuM9F No.55373 Reply
>>55370

2 days plugging away at it on and off (not even really trying), I'm already in the top 300 out of nearly 3 and a half million people in recent credit.
>>
Edwin Salpeter - Mon, 01 Jun 2015 21:31:35 EST lHGvTKQL No.55378 Reply
Cool beans, interpol.

I like to say "boinc" and I like what they're trying to do but my graphics cards sucks balls, so keep up the good work!

The coldest spot in the known universe

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- Thu, 06 Feb 2014 17:29:09 EST KfBom9VV No.52948
File: 1391725749022.jpg -(92253B / 90.09KB, 753x587) Thumbnail displayed, click image for full size. The coldest spot in the known universe
http://phys.org/news/2014-02-coldest-universe.html
>NASA researchers are planning to create the coldest spot in the known universe inside the International Space Station.

>Researchers like Thompson think of the Cold Atom Lab as a doorway into the quantum world. Could the door swing both ways? If the temperature drops low enough, "we'll be able to assemble atomic wave packets as wide as a human hair—that is, big enough for the human eye to see." A creature of quantum physics will have entered the macroscopic world.
9 posts and 1 images omitted. Click View Thread to read.
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Cecelia Payne-Gaposchkin - Mon, 18 May 2015 20:13:18 EST 1K+dACgX No.55325 Reply
>>55319
Western audiences wouldn't get the reference using any other board, but the philosophy behind ancient Chinese chess aphorisms remains, hence the disconnect between what is seen and what is heard.
>>
Heinrich Olbers - Tue, 26 May 2015 22:01:17 EST 3/OhnWkk No.55371 Reply
No guys, it's my fucking ex girlfriends heart.

the coal of space colonies

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- Wed, 11 Feb 2015 00:11:33 EST 415JX8nG No.55023
File: 1423631493853.jpg -(63140B / 61.66KB, 600x428) Thumbnail displayed, click image for full size. the coal of space colonies
I recently came across a wikipedia article on carbonaceous chondrites, a particular kind of asteroid.
Www.wikipedia.org/wiki/Carbonaceous_chondrite


But what makes these awesome is that they are up to 20% water, contain amino acids (which is very interesting), and sulfur compounds and other biologically useful compounds.

To me it seems readily apparent that these things could of fueled the formation of life during the earths construction. But if these things brought life to earth, shouldn't we bring them to planets and moons we colonize? I mean, work backwards man.

A cool thought is that the first asteroid we bring to mars will be the beginning of its inevitable terra formation
22 posts and 8 images omitted. Click View Thread to read.
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Alan Guth - Mon, 25 May 2015 02:59:25 EST 415JX8nG No.55367 Reply
Maybe we could build a giant lens in between mars and the sun. Tons of giant sheet like lenses layered over a huge distance, possibly all the way inside mercury's orbit, set up kind of like the death stars planet destroyer. The ones closer to the sun would be a mix of the future lenses and mirrors, concentrating the photons into a series of additional sheet lenses inbetween the sun and mars. The lenses in this part would play two primary functions, further concentrate the sun, and also block protons emanating from the sun, (assuming protons actually move in a straight line from the sun, I have a hunch they don't.)
Of course it would be a massive infrastructure project, be we're terraforming baby. The technology I'm talking about will also be here soon, if not on this scale.
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Bernhard Schmidt - Mon, 25 May 2015 03:36:19 EST YHjXylC8 No.55368 Reply
1432539379762.jpg -(130941B / 127.87KB, 768x512) Thumbnail displayed, click image for full size.
>>55367
Objects closer to the thing they orbit have a shorter period, though slower velocity than objects further out.
The interaction between two object's orbits produces 5 areas where technically an object could sit relative to the planet. In practice, objects don't remain there for very long (Lagrange 1 and 2 are particularly unstable) until reactions with the other bodies and the solar wind pulls them out, except for Jupiter, because Jupiter is fucking massive.
Any large sheets put outside a magnetic field in space will function like a solar sail, being pushed back by the solar wind it catches/deflects.
Magnetic sails work the same way, except they use an imbalanced in charged particles captured in a magnetic field to deflect charged particles.
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Alan Guth - Mon, 25 May 2015 11:15:15 EST 415JX8nG No.55369 Reply
>>55368
Yeah I thought about that after I posted it, can't just stick whatever I want wherever I want, there are no arbitrary orbits

What if real space is whats outside this reality? Oh God this is driving me nuts

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- Wed, 20 May 2015 02:17:19 EST ipV4Szrg No.55327
File: 1432102639228.jpg -(845941B / 826.11KB, 1024x768) Thumbnail displayed, click image for full size. What if real space is whats outside this reality? Oh God this is driving me nuts
What if this reality (all of its dimensions which are interconnected) exist in a vacuum like we observe outside of the limits of Earth, but on a higher scale?
And what if BEINGS like "angels" or "gods" existed in this "space"?
Could any "being" from this realm ever exist in this new concept of "space"?
What implications does this have on philosophy, on religion, on spirituality, on the meaning of life in general?
If this was somehow proven to be true, what is the purposed of living here on a smaller, obviously now inferior scale?
Is it meaningless to think of such a thing in this life, even if it was real?
Even more importantly does anyone know what I'm talking about?
2 posts omitted. Click View Thread to read.
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Tycho Brahe - Thu, 21 May 2015 17:07:26 EST eJc7PJV5 No.55335 Reply
OP next time you're gonna fly somewhere, take the window seat of a plane and watch out the window as it takes off...
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Allan Sandage - Fri, 22 May 2015 11:36:01 EST oFxIIvpQ No.55349 Reply
>>55331

>>55335

You're right.
Don't smoke a pound of DMT your first time, right....
This kinda thinking only leads to one place eventually...
>>
Arthur Eddington - Fri, 22 May 2015 17:43:29 EST eJc7PJV5 No.55353 Reply
>>55349
Smoking a pound of DMT is stupid... IMO it would be better to take progressively large doses each time, and to space things out. High speed mental re-formatting is fun as fuck but don't give the people at D.A.R.E. the opportunity of using your misuse to give a bad name for DMT

cause science

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- Sat, 09 May 2015 05:30:50 EST PbKyoTEf No.55282
File: 1431163850929.jpg -(94545B / 92.33KB, 900x473) Thumbnail displayed, click image for full size. cause science
Maybe I'm just too uneducated of a pleb in the realm of physics to see why this isn't the case, but can someone explain to me why, if we need to adjust our models with something that is 97% at least partially empirically unsubstantiated (dark matter-energy) then why don't we question first if there is some flaw in our model or bias in our thinking?
Thought experiment to exemplify: for the most part, we as biological beings as well as our most advanced instrumentation can detect faster than light particles in only the most abstruse ways; our perception, as is perhaps natural given our evolutionary heritage, is tuned to light. Might the supposition that no (or only special) particles go FTL be an example of circular thinking? Could not the existence of small but significant portions of the universe moving faster than light at any given time, such as ships from interstellar civilizations, or perhaps natural ftl phenomena which is invisible to our photon based instrumentation, account for the observed matter-energy discrepancy (given that an ftl object would disporportionately displace and deflect photons compared to any object moving in normal space, and that, if such ftl worked on means of creating geometric distortions in spacetime such as the Alcubierre drive, produce a net distortion on the observed mass of the universe by the fact of their mass negating local spacetime frames. )
This idea is cobbled together from wikipedia articles, some post-sec hard sciences, watching too much star trek and being turnt the fuck up. If someone more versed in physics can explain to me why there is a very good reason this cannot be the case, I'd very much like to hear it.
21 posts and 3 images omitted. Click View Thread to read.
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Edwin Hubble - Tue, 12 May 2015 19:14:35 EST RVWMYu65 No.55316 Reply
>>55310
Not exactly. Dark energy is most commonly explained by the presence of a cosmological constant. It's a term in Einstein's GR which falls out in the derivation, Einstein famously used it to fix a relativistic universe to be static when really the equations would predict a collapsing or expanding universe in the presence of matter only. The cosmological constant seems perfectly capable of doing the job but there are concerns with it and particle physics. In a sense the cosmological constant is gravity as we understand it today.

The next idea is to remove the issues with particle physics and set the cosmological constant to zero. It is replaced with modifications to Einstein's gravity at large scales. These other gravitational models can also describe dark energy as it is observed.

The other idea is of course 5th forces like quintessence. These are often harder to test but predictive models of them do exist.

This is why dark energy experiments are so big right now because cosmology has built a bridge to particle physics and the fundamental forces can be tested on the largest scales.
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Daniel Kirkwood - Fri, 15 May 2015 16:17:06 EST AKbZww5z No.55320 Reply
>>55315
I agree, this is a waste of time. This thread has clearly already come to it's conclusions, mostly through just reiterating your own thoughts so loudly that any idea I was articulating got drowned out. For all the shit you know, you are really fucking dumb as a brick and painfully -- dangerously -- narrow minded. If you can't see the circular arguments in your own statements, I feel sorry for you son. Keep worshipping at the scientism altar for as long as you like. Good luck with that.
Nb because this thread was shittrolled into never really discussing the matter of the OP.
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Annie Cannon - Sun, 17 May 2015 19:05:23 EST X4AXKa/R No.55323 Reply
>>55320
Your entire argument is circular as I pointed out. When pressed for evidence all you do is dig the hole deeper and deeper and gradually add insults as sophism fails.

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