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fate of universe by Jocelyn Bell - Sun, 14 Sep 2014 23:31:05 EST ID:SknUZfy5 No.54393 Ignore Report Reply Quick Reply
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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
>>
Joseph-Louis Lagrange - Sun, 14 Sep 2014 23:47:12 EST ID:/FJQtAXr No.54394 Ignore Report Quick Reply
>>54393

You're thinking of the Big Crunch.
>>
Thomas Gold - Mon, 15 Sep 2014 10:43:08 EST ID:psUbi2cW No.54395 Ignore Report Quick Reply
The Big Crunch doesn't necessarily mean another Big Bang though.
Look for the the Big Bounce, or the Cyclic model, OP.
Easy wiki-links because I'm lazy:
http://en.wikipedia.org/wiki/Big_Bounce
http://en.wikipedia.org/wiki/Cyclic_model


UFOS by Johan Galle - Fri, 12 Sep 2014 22:33:49 EST ID:9ZvewKzu No.54386 Locked Ignore Report Reply Quick Reply
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https://www.youtube.com/watch?v=c7uQf1tL_70
Intredasting
Locked
Thread has been locked
Thread was locked by: synthetic
Reason: /spooky/ or /tinfoil/
>>
Isaac Newton - Sat, 13 Sep 2014 18:20:43 EST ID:/FJQtAXr No.54389 Ignore Report Quick Reply
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>>54386

Very interesting, indeed. This kind of shit is what I'm about.
>>
Vesto Slipher - Sun, 14 Sep 2014 10:18:48 EST ID:6tK+Pyz+ No.54390 Ignore Report Quick Reply
Shouldn't this go on /spooky/


Curiosity arrives at Mt Sharp by Gerard Kuiper - Thu, 11 Sep 2014 20:06:59 EST ID:tyKhVGeE No.54374 Ignore Report Reply Quick Reply
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Curiosity has turned south sooner than was planned and has reached the base of Mt Sharp.
http://www.sciencedaily.com/releases/2014/09/140911183005.htm
>>
Hannes Alven - Thu, 11 Sep 2014 23:00:16 EST ID:OsV3zf7o No.54377 Ignore Report Quick Reply
>>54374
It's kind of depressing when you look at the distance the rover has traveled in km. A team of humans on the surface could have looked at all of that stuff in a matter of hours without a vehicle. When we finally drop a human there, we're going to get a much data in the first day as we did in a couple years of driving rovers around.
>>
Arthur Eddington - Thu, 11 Sep 2014 23:31:06 EST ID:GgeRBdCB No.54378 Ignore Report Quick Reply
>>54377
When do you think this will happen?
>>
William Hartmann - Fri, 12 Sep 2014 20:32:04 EST ID:OXINl/7g No.54383 Ignore Report Quick Reply
>>54378
I'd say within the next 30+ years, if we really get our shit together. I'll consider myself lucky if it happens within my lifetime.
>>
Thomas Gold - Sat, 13 Sep 2014 15:58:45 EST ID:09NA5eRB No.54388 Ignore Report Quick Reply
>>54383
Opportunity's done so well though. Still going after 10 years and 40 km

http://mars.jpl.nasa.gov/mer/mission/status_opportunity.html


The grandfather paradox has been somewhat resolved by Netjester - Wed, 03 Sep 2014 05:28:00 EST ID:HIn9Ejqn No.54351 Ignore Report Reply Quick Reply
File: 1409736480145.png -(67873B / 66.28KB, 277x252) Thumbnail displayed, click image for full size. 67873
http://www.scientificamerican.com/article/time-travel-simulation-resolves-grandfather-paradox
1 posts omitted. Click Reply to view.
>>
Karl von Weizsacker - Fri, 05 Sep 2014 13:37:56 EST ID:cEGy78pj No.54356 Ignore Report Quick Reply
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>>54352
radio with pictures?
it'll never work!
>>
Sloth - Fri, 05 Sep 2014 18:35:35 EST ID:WG/dK64g No.54357 Ignore Report Quick Reply
>>54352
Time travel IS possible, most likely not being able to go into the past, but going into the future IS in fact possible. Our Cosmos proves this. I didn't read this article at all but spotted your comment. Come on dude!
>>
Cecelia Payne-Gaposchkin - Mon, 08 Sep 2014 03:11:44 EST ID:TRhiJN4K No.54360 Ignore Report Quick Reply
>>54351
>>54357
>>54352

As someone who believes that the concept of time travel must be impossible because of the paradoxes it creates, I have to say that the concept itself comes form our misunderstanding of what time is, and as such relativity as a theory is either missing something big or is fundamentally flawed. Not that I have the answer, but I'll let you know when I do.
>>
Friedrich von Struve - Thu, 11 Sep 2014 16:07:12 EST ID:ksAXy5yQ No.54373 Ignore Report Quick Reply
>>54360
Backwards time travel is impossible because you would have to cause negative time dilation by going faster than the speed of light. Or by somehow having negative mass to start with. (I could link wikipedia on this)

Approaching light speed will move you forwards in time by slowing your relative time, but we already learned that from Cosmos (remember the scooter?).

We already know that traveling forward in time is possible (you're doing it right now), but backwards seems to be impossible until we can work around the light barrier.
>>
Ejnar Hertzprung - Fri, 12 Sep 2014 01:18:19 EST ID:jMZLJuT8 No.54379 Ignore Report Quick Reply
>>54352
don't doubt Netjester man, the machines know


DIY Space Shot by Daniel Kirkwood - Sun, 10 Aug 2014 15:42:21 EST ID:Fs3nWwi0 No.54254 Ignore Report Reply Quick Reply
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How much do you reckon it'd take to make a homemade rocket capable of launching yourself into orbit?
2 posts omitted. Click Reply to view.
>>
George Gamow - Thu, 14 Aug 2014 03:25:34 EST ID:4BG8qm42 No.54283 Ignore Report Quick Reply
You would problably be shot down before getting to orbit so...
>>
Kiyotsugu Hirayama - Thu, 14 Aug 2014 10:42:21 EST ID:YOJeQJFe No.54284 Ignore Report Quick Reply
It would be very difficult costing hundreds of thousands at the very least. A good reference is Copenhagen Suborbitals who now have quite a large operation, and that's just a mercury style suborbital launch. It's not something for one person and it would take a lot of experienced engineers.
>>
Alan Guth - Fri, 22 Aug 2014 10:10:41 EST ID:Onsl/yzs No.54326 Ignore Report Quick Reply
>>54254
https://www.youtube.com/watch?v=P5JxXka50Gw

Here ya go!

(Apparently it'll cost you around $50,000, but I don't know if using a helium balloon elevated platform would reduce the cost significantly. I would think it would, because it would bring you to the edge of space, reducing the amount of distance you need to travel, but I dunno)
>>
Joseph Taylor Jr. - Fri, 22 Aug 2014 10:26:27 EST ID:kviwdVC/ No.54329 Ignore Report Quick Reply
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>>54326
You don't get to space by going up, you get there by going really fast.
While you could reduce atmospheric losses this way, there's a reason everyone tries to build launch sites as close to the equator as possible, rather than atop really high mountains.
>>
Arthur Eddington - Tue, 09 Sep 2014 23:05:25 EST ID:OXINl/7g No.54370 Ignore Report Quick Reply
>>54254
If my experience with Kerbal Space Program is any indicator, it will cost one metric fuckload of cash, and you'd probably explode long before orbit. And even if you made it, you'd explode in orbit or run out of fuel before you could ever get home.

/scientific approach


Space is crazy! by Hannes Alven - Sat, 06 Sep 2014 19:45:36 EST ID:xFSNE6M1 No.54358 Ignore Report Reply Quick Reply
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Guys, do you ever like look up at the night's sky, and think to yourself, wow man, that's like so big and we're so small.

It's like, wow, really. I just can't believe it.

I just need a smoke of my weed to even comprehend or appreciate how magical the outer space really is.

Like, what if we aren't alone, what if they're aliens up there, and they're thinking the same thing as us. What if there's some alien up there looking at us. Or rather our star. What a mind trip. Man, I just need an acid bump to really appreciate how beautiful this idea is. I mean, when you're on acid, I really think the aliens are talking directly to you. I mean, in your mind. Has anyone else even experienced this? I might be alone, who knows, but I know I'm not alone in the universe, haha.

Well, hope I connected with someone here, this tokes to you /sagan/ *wink*


No thread about this?! by Wilhelm Beer - Sat, 09 Nov 2013 15:34:11 EST ID:uV+6zbtM No.52205 Banned Ignore Report Reply Quick Reply
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Today is Carl Sagan's 79th birthday.
If he was still among us, what scientific or technological achievement would he be the most impressed with ? (He died on december 20th 1996)
Banned
User was banned for this post
User was banned by: Jericho
Reason: Remember: No billboards in space.
78 posts and 46 images omitted. Click Reply to view.
>>
Ejnar Hertzprung - Tue, 27 May 2014 16:24:59 EST ID:Uob8qVnu No.53869 Ignore Report Quick Reply
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>>52205
Bumping While Sagan'd
>>
Carl Seyfert - Wed, 28 May 2014 07:43:50 EST ID:ffJJkPeF No.53874 Ignore Report Quick Reply
At first I was wondering how this thread was still alive, but then I realized I was on /sagan/. I miss you Carl. I never even met you, and then you died, faggot. I'll see you in the afterlife, when we're dancing through the stars
>>
Bernard-Ferdinand Lyot - Sun, 08 Jun 2014 22:29:28 EST ID:JwkK+Ito No.53981 Ignore Report Quick Reply
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BWH watching the season finale of the new COSMOS
>>
Karl Swarzchild - Sun, 06 Jul 2014 17:09:29 EST ID:R0S4fgzg No.54079 Ignore Report Quick Reply
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BWH i want to keep this thread alive for a whole year

i'll make a new one nov 9
>>
Edward Barnard - Mon, 01 Sep 2014 22:35:45 EST ID:R0S4fgzg No.54347 Ignore Report Quick Reply
bump


Anomalous Thrust Device and other potential replacements for chemical thrusters by Tycho Brahe - Mon, 04 Aug 2014 03:50:04 EST ID:qrJEl2Cn No.54211 Ignore Report Reply Quick Reply
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http://www.wired.co.uk/news/archive/2014-07/31/nasa-validates-impossible-space-drive

So this seems pretty rad. I'm suprised there wasn't a thread about this all ready. I recall also reading somewhere and seeing in one or two different NOVA episodes other things about promising future propulsion systems that might replace chemical rockets one day soon. What do y'all know? What's the most promising up and coming propulsion technology?

For instance, the image I have provided is apparently one taken by a camera aboard the IKAROS spacecraft, which is one of the first spacecraft powered by a solar sail and sent out by Japan in 2010. That's another technology that I am personally looking forward to. So what is /sagan/ most excited about?
16 posts omitted. Click Reply to view.
>>
Alan Guth - Fri, 22 Aug 2014 10:14:21 EST ID:Onsl/yzs No.54327 Ignore Report Quick Reply
Hydrogen fuel.
It's the cleanest and most efficient form of combustion fuel out there.
It honestly makes way more sense for a green society than gasoline for cars, though the possible explosion thing is a little off-putting.
>>
Alan Guth - Fri, 22 Aug 2014 10:23:29 EST ID:Onsl/yzs No.54328 Ignore Report Quick Reply
Also, this technology isn't that new.

http://www.popularmechanics.com/science/space/deep/cosmic-concept-laser-powered-space-travel-16020462
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Carl Seyfert - Sat, 23 Aug 2014 17:28:51 EST ID:ZstOB5GX No.54334 Ignore Report Quick Reply
This technology provides the thrust equivalent of an infant battling a de-clawed kitten.

It's worse than a solar sail. I'll admit it's the cheapest option.
But even the cheapest set of tools won't last more than a day or two in an industrial setting.
>>
Grote Reuber - Sat, 23 Aug 2014 19:07:52 EST ID:riVRYHVm No.54335 Ignore Report Quick Reply
>>54334

Thrust isn't everything. In deep space, efficiency is quite a bit more important than raw thrust.
>>
Vera Rubiin - Mon, 25 Aug 2014 15:56:21 EST ID:ZstOB5GX No.54341 Ignore Report Quick Reply
>>54335
That's true, But its only real use is a backup to xenon thrusters.
It's like trying to power a hybrid car on AA batteries.

Possibly after a lot of research it could be useful, But right now I doubt any agency would use it for anything more than research purposes


Comet dances with the Snake by Friedrich Bessel - Fri, 22 Aug 2014 17:37:16 EST ID:qjY4VCQP No.54332 Ignore Report Reply Quick Reply
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Comet Jacques is fairly high in the Northern Hemisphere for the next little while, in a relatively easy location to spot. This hardy bugger comes in at about +11 magnitude (although some say it's more like +7), meaning you will probably want a solid telescope to be able to see it but you could maybe use binoculars if you have a big pair. It will look like a fuzzy, blurry ball.

What's convenient is it's placement in the sky (Which I will post in the thread)
Comet Jacques is located in the constellation Cassiopeia, which looks like a W or M triangley shape of fairly bright stars about halfway up in the North East direction. It's a very noticeable constellation and you won't miss it after you've seen it a few times.

Pic is the comet itself
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Friedrich Bessel - Fri, 22 Aug 2014 17:39:17 EST ID:qjY4VCQP No.54333 Ignore Report Quick Reply
1408743557264.png -(12281B / 11.99KB, 400x400) Thumbnail displayed, click image for full size.
This is where it will be tonight on August 22nd. It will continue shooting upward at an angle every night.


Generation ships? by Kocoayello !jxaL03vL/Q - Thu, 01 May 2014 00:44:07 EST ID:FFrIb9VN No.53643 Ignore Report Reply Quick Reply
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WIll, and how, will they work? Where will the water, air, etc come from? Or should we just start pooling money into stargate research?
14 posts and 4 images omitted. Click Reply to view.
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Karl Swarzchild - Thu, 21 Aug 2014 13:39:42 EST ID:j5S69k77 No.54323 Ignore Report Quick Reply
>>54322
You're talking complete bollocks. Centripetal force does not generate gravity. Centrifugal force can simulate gravity, completely different. No, gyroscopes don't change that. Please take claims of secret projects to /tinfoil/.
>>
Nicolaus Copernicus - Thu, 21 Aug 2014 17:51:21 EST ID:4iCWeNb1 No.54324 Ignore Report Quick Reply
>>54323
FTL is actually a thing http://news.nationalpost.com/2012/11/29/nasa-is-actually-working-on-a-faster-than-light-warp-drive-but-it-might-blow-up-any-planet-it-travels-to/
>>
Isaac Newton - Thu, 21 Aug 2014 21:53:14 EST ID:Rxep1UCE No.54325 Ignore Report Quick Reply
>>54324
a) Not a secret project b) The experiment is not testing anything approaching FTL propulsion.
>>
Edwin Hubble - Fri, 22 Aug 2014 15:37:02 EST ID:ZstOB5GX No.54330 Ignore Report Quick Reply
>>54320
Picture a bucket filled half way with water.
Now spin the bucket in a large circle. With enough moment the water will be forced to the bottom of the bucket, even if it's upside down.
That's centripetal force.

Now take the same bucket half filled with water.
Put it in the car. and go for a drive
As the car accelerates, the water will move in the opposite direction of velocity. (Ie, backwards) It will slowly angle towards the back of the bucket.
This is known as a pseudo or fictitious force. It's not an anctual force, It's just the delay between the transfer of kinetic information throughout an object.
So technically, The object is resisting being pull apart.
It's why you will feel acceleration in the car, but not the velocity.

Now mix the two forces together.
Except the centripetal force will be a lot more than you can do with a bucket and water. And the fictitious force will be a continuous acceleration of a multi ton mass going to speeds which we as humans have never seen before.

Essentially every part of that spaceship will be under a different amount of stress every second, No matter how well it's designed, Just one single failure will cause that force to be routed and well the Spaceship turns into tissue paper in a fan blade.
>>
William Lassell - Mon, 01 Sep 2014 19:19:27 EST ID:ksAXy5yQ No.54345 Ignore Report Quick Reply
>>54330
I believe this "fictitious force" you're talking about is inertia.


Lunar Meteorite by Edward Pickering - Mon, 18 Aug 2014 12:35:21 EST ID:UpiDqeof No.54303 Ignore Report Reply Quick Reply
File: 1408379721430.jpg -(106749B / 104.25KB, 960x741) Thumbnail displayed, click image for full size. 106749
Kickstarter campaign to purchase Lunar Meteorite

https://www.kickstarter.com/projects/1141594225/lunar-meteorite-boxes
>>
Antony Hewish - Mon, 18 Aug 2014 15:54:11 EST ID:ksAXy5yQ No.54304 Ignore Report Quick Reply
>>54303
I am having trouble figuring out the purpose of this without context.
>>
William Herschel - Wed, 20 Aug 2014 01:21:51 EST ID:4iCWeNb1 No.54315 Ignore Report Quick Reply
are there moonrocks on the open market?
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William Herschel - Wed, 20 Aug 2014 01:30:07 EST ID:4iCWeNb1 No.54316 Ignore Report Quick Reply
watched 1/2 the video and apparrenty, yes. there are moonrocks for sale.


Your own pictures from space by Karl Swarzchild - Tue, 12 Aug 2014 08:20:59 EST ID:inbFqjv5 No.54275 Ignore Report Reply Quick Reply
File: 1407846059236.jpg -(91938B / 89.78KB, 640x1136) Thumbnail displayed, click image for full size. 91938
I was out camping last week and brought along my telescope. It was the first time i've seen another planet with my own eyes. Seeing the rings around Saturn was fucking amazing man. I was even able to see one of it's moons. So goddamn cool. Can we have a thread dedicated to pictures we took ourselves? This one is pretty shitty, but it's the best i could do holding my phone up to the eye piece. It was still a pretty badass experience.
6 posts and 3 images omitted. Click Reply to view.
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Johan Galle - Tue, 19 Aug 2014 16:00:34 EST ID:qjY4VCQP No.54310 Ignore Report Quick Reply
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This Month's Super Moon
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Johan Galle - Tue, 19 Aug 2014 16:01:42 EST ID:qjY4VCQP No.54311 Ignore Report Quick Reply
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Here's a few days earlier, when the Moon skimmed a nearby mountain.
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Johan Galle - Tue, 19 Aug 2014 16:02:32 EST ID:qjY4VCQP No.54312 Ignore Report Quick Reply
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This one was taken a few months ago.
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Johan Galle - Tue, 19 Aug 2014 16:03:16 EST ID:qjY4VCQP No.54313 Ignore Report Quick Reply
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a feeble attempt at Jupiter
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Johan Galle - Tue, 19 Aug 2014 16:06:18 EST ID:qjY4VCQP No.54314 Ignore Report Quick Reply
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I tried saturn but it's pretty hard to get, due to the dimness and my awful camera


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