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thowing up in your helmet by Johann Encke - Thu, 02 Mar 2017 18:37:45 EST ID:yfFUwunc No.56847 Ignore Report Reply Quick Reply
File: 1488497865596.gif -(2064671B / 1.97MB, 250x256) Thumbnail displayed, click image for full size. 2064671
Anyone here trying to become an astronaut? I've always wondered what working in space would be like and how bright the stars would shine. Anyone else/
3 posts and 1 images omitted. Click Reply to view.
>>
William Hartmann - Wed, 15 Mar 2017 00:10:15 EST ID:OXINl/7g No.56864 Ignore Report Quick Reply
These days, to be an astronaut, you have to be a fucking fighter pilot with a PhD in astrophysics or something. The reqs are insane.
>>
Chushiro Hayashi - Tue, 28 Mar 2017 22:30:48 EST ID:rYS5OuxM No.56894 Ignore Report Quick Reply
yea bro im taking ASTRO101 and 102 at community college this summer, should get my astronaut license by october, should be p. cool
>>
Anders Angstrom - Fri, 31 Mar 2017 02:29:16 EST ID:UUK/Eqa/ No.56898 Ignore Report Quick Reply
>>56894
fuck all that shit ive been watching vids, i got this shit bro hold my beer.
>>
Antony Hewish - Thu, 20 Apr 2017 15:05:50 EST ID:yfFUwunc No.56922 Ignore Report Quick Reply
>>56894 YAAAAAAAAAAAAAAAAAAAAAAAAAAAAY good job and don't die
>>
Giuseppe Piazzi - Wed, 10 May 2017 05:47:05 EST ID:ckzzwmzc No.56935 Ignore Report Quick Reply
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>>56848
>not getting life extending cybernetics that will be real in our time to get a ride to space later.

I think realisticly a lot fo people are going to die soon so survive that and any one left will be go for space, it will be needed.. it's really not that hard you just can't ever fuck up once.


Accelerating Expansion of the Universe by Johann Encke - Thu, 23 Mar 2017 18:41:02 EST ID:pYbb5iMl No.56876 Ignore Report Reply Quick Reply
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So if new space is created every now and then at greater speed and making them galaxies recede and shift to the reddest part of the spectrum, how much time until we're converted into a gaseous fading cosmic entity? How do we even perceive space? How would we perceive space expanding when it eventually gets fast enough to notice?
12 posts and 1 images omitted. Click Reply to view.
>>
Mike Brown - Mon, 03 Apr 2017 15:06:53 EST ID:7jcVAyVz No.56904 Ignore Report Quick Reply
>>56903
Everything about the rip scenario is dependent on the nature of dark matter/energy. Specifically the ratio between its density and pressure, which may be positive or negative, or even zero (in the case where it turns out the dark substances aren't real.) The only real way we can differentiate between these cases is by getting actual observational evidence on this characteristic of the dark substances.
>>
Ejnar Hertzprung - Wed, 05 Apr 2017 14:49:04 EST ID:f/Tl+D5o No.56905 Ignore Report Quick Reply
I think there are beams of light and holes in the wall from the centralized spectral creation. We are one of the beamed holes, because we expanded from a such tiny space compression.
>>
Paul Goldsmith - Wed, 05 Apr 2017 16:12:44 EST ID:7jcVAyVz No.56906 Ignore Report Quick Reply
1491423164905.jpg -(45042B / 43.99KB, 564x458) Thumbnail displayed, click image for full size.
>>56905
>>
Ejnar Hertzprung - Wed, 12 Apr 2017 00:12:46 EST ID:TSBuLBRU No.56910 Ignore Report Quick Reply
>>56903

how can anything ever overcome the force of gravity? isn't its reach limitless?
>>
Daniel Kirkwood - Wed, 12 Apr 2017 16:18:05 EST ID:7jcVAyVz No.56911 Ignore Report Quick Reply
>>56910
But it's power isn't limitless. Consider that the reach of the power of the sun's gravity is much stronger than the earth's, but because you are much closer to the earth, the sun's gravity doesn't pull you into it (well, it does in that it keeps the earth in orbit, but you see my point, that just because a force extends infinitely doesn't mean it isn't weaker at any given place than some other force.)


Contact by Georges-Henri Lemaitre - Tue, 07 Mar 2017 10:24:21 EST ID:d9ijPul/ No.56851 Ignore Report Reply Quick Reply
File: 1488900261387.png -(5339B / 5.21KB, 1914x936) Thumbnail displayed, click image for full size. 5339
Say we could float around and travel in space like a super saiyan god: Could we create scouters which could contact people with the same scouter intergallactically?
13 posts and 1 images omitted. Click Reply to view.
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Isaac Newton - Sun, 19 Mar 2017 20:59:18 EST ID:tNU6hJcf No.56869 Ignore Report Quick Reply
na but u cud use Instant Transmission to teleport and chat then teleport back
>>
Edwin Salpeter - Mon, 20 Mar 2017 03:31:27 EST ID:RH1VsRBv No.56870 Ignore Report Quick Reply
>>56865
>The Tao is like a well:
>Used but never used up.

wells run dry all the time
>>
Carl Seyfert - Wed, 22 Mar 2017 06:55:46 EST ID:d9ijPul/ No.56871 Ignore Report Quick Reply
>>56870
yeah the bad ones without a large influx to source from.
>>
Johann Encke - Sun, 09 Apr 2017 04:20:44 EST ID:eKHOYimM No.56908 Ignore Report Quick Reply
>>56870
If it does up it wasn't a well, it was a just hollow.
>>
John Bahcall - Sun, 09 Apr 2017 16:22:13 EST ID:7jcVAyVz No.56909 Ignore Report Quick Reply
>>56908
You don't understand how wells work do you?


Dark matter matters by Clyde Tombaugh - Wed, 09 Nov 2016 03:09:08 EST ID:zHoQtF+M No.56645 Ignore Report Reply Quick Reply
File: 1478678948074.jpg -(23713B / 23.16KB, 259x450) Thumbnail displayed, click image for full size. 23713
There's 10 times more matter in the universe than we thought:
http://blogs.discovermagazine.com/d-brief/2016/10/13/the-universe-is-20-times-more-vast-than-we-thought/#.WCLTmjU2thE

A natural law for rotating galaxies:
http://www.physicscentral.com/buzz/blog/index.cfm?postid=5308541299875990673

And finally, matter causes entropy displacement which accounts for the dark matter effect:
https://arxiv.org/abs/1611.02269

TL;DR, we found our missing mass, we can see that rotation speed varies with the amount of visible matter, and with a better understanding of gravity, the whole concept and purpose of dark matter is bunk.
21 posts and 5 images omitted. Click Reply to view.
>>
Daniel Kirkwood - Tue, 14 Feb 2017 03:27:41 EST ID:M/g1akbS No.56785 Ignore Report Quick Reply
>>56783
>Yo, I agree with most of what you've said man but...
Yeah, I was mad in that last part, excuse the flippancy. You raise a valid point about the snapshots-in-time. The only caveat is that we can observe [usually] the same type of effect in several locations in the sky. This can give us a good correlation to the observed effect being distributed evenly in the universe.


It is my sincere wish, however, that we stop poking logic holes in each others' theories [see >>56645 and >>56748 ], and start referencing actual science articles to back up assertions. OP did a good job supplying articles to chew on, followed by good counterpoints by others. Lets get more of that.
>>
Johann Bode - Fri, 17 Feb 2017 23:29:59 EST ID:yzfSDg8q No.56789 Ignore Report Quick Reply
>>56785
Well I wouldn't call it a snapshot in time, but rather a snapshot in perception. Our view of the universe is always changing, so the picture we have right now is only a snapshot, regardless of how much time it represents. You can say the current laws of physics are immutable and timeless, but these laws have only been accepted as a general concept of the universe for a couple hundred years. Previous theories of the universe such as Platonic Idealism were also based on observation, and were of course supposed to be immutable. They lasted for thousands of years.
>>
Bruon Rossi - Mon, 27 Feb 2017 13:16:01 EST ID:FoZr+PSB No.56843 Ignore Report Quick Reply
http://cosmos.nautil.us/short/144/the-physicist-who-denies-that-dark-matter-exists
>Dark matter is our generation's ether
>>
George Herbig - Tue, 28 Feb 2017 21:08:22 EST ID:7jcVAyVz No.56845 Ignore Report Quick Reply
>>56843
If a0 is equal to the speed of light divided by the radius of the universe, since the radius of the universe is equivalent to the time since the big bang and thus always increasing, presumably this also means the acceleration constant decreases overtime, which means the same amount of force creates more acceleration, right? (thus accelerating expansion) is this an intentional aspect of MOND? Why didn't they predict an accelerating universe beforehand if so?
>>
John Bahcall - Wed, 01 Mar 2017 19:11:28 EST ID:e0oA2mYt No.56846 Ignore Report Quick Reply
>>56843
Wrote a big response but the board swallowed it twice. Milgrom is talking shit, MOND doesn't bridge anything with the largest scales. It fails if you look at anything beyond galaxies. Galaxy clusters, Milgrom admits you need dark matter. Standard cosmology needs dark matter for structure formation but MOND doesn't do structure formation correctly at all, the extra gravity fucks things up. Lastly there is no MOND cosmology, previous attempts to predict the cosmic microwave background were abandoned after they became incompatible with the observations. The only thing MOND does well is galaxies which it was designed to do, it was a model to fit the data, not derived.

Lastly the radius of the universe is a number derived from cosmology, if you change the cosmology to MOND it's not the same. The point about a_0 makes no sense.

>>56845
MOND makes gravity stronger on large scales so that would increase the pull of gravity between galaxies, increasing the deceleration. MOND doesn't have a cosmology so it can't really make these predictions.


Europa Mission by Ejnar Hertzprung - Thu, 18 Aug 2016 23:04:09 EST ID:Y3T9nNnZ No.56318 Ignore Report Reply Quick Reply
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Anyone else hyped for the Europa mission?

https://www.youtube.com/watch?v=GqTaDCt_F1Y

The US gov't has given NASA $30 millon to go poke around up there. They're gonna try to scoop up ejecta and see what's in it. I haven't been this interested in a mission since the Titan lander.
11 posts and 2 images omitted. Click Reply to view.
>>
James Christy - Wed, 26 Oct 2016 20:20:15 EST ID:10QI3ruX No.56559 Ignore Report Quick Reply
>>56558
You've gotta think about the big picture here. Life in space, sustainable places for people to live, things that could be mined (cause yes humans will eventually sap away from everywhere they vist and live) its like the cycle of industrialization starting up again. But only this time, its going to be on other planets. Mars colonization is the first step to this, discoveries in space will prod on intrest, and in the end, we'll end up with a very much diffrent existance as human beings. Mankind can spread out to the stars, and make colony after colony, thats how I envision it.
>>
William Lassell - Thu, 03 Nov 2016 16:15:00 EST ID:OXINl/7g No.56616 Ignore Report Quick Reply
>>56558
There's probably no direct incentive outside of advertising (Company X went to Europa, so buy our shit because we're awesome like that). But these are all kinds of scientific benefits that might also be good for a private company down the road: pharmaceuticals, materials science, genetic engineering, etc. Plus just having the infrastructure in place in capitalize on new sources of ET-related income if/when they figure one out would allow you to get in on the ground floor, so-to-speak.
>>
Astrobiology Student - Wed, 23 Nov 2016 16:14:22 EST ID:UuJsarOA No.56671 Ignore Report Quick Reply
I am! In fact, my Astrobio class had to do mission proposals for a few bodies to search for potential life. My group got Europa, so we came up with the porbe part of CLIPPER that congress asked for. Yes NASA is doing their own that hits the counsel next moth, but its a school project. Let me know if anyone is interested in the presentaton!
>>
Fred Whipple - Fri, 10 Feb 2017 04:24:21 EST ID:tNU6hJcf No.56781 Ignore Report Quick Reply
>>56671

please, share some of the key details
>>
George Gamow - Thu, 16 Feb 2017 22:54:10 EST ID:U3oyeBRN No.56788 Ignore Report Quick Reply
>>56318

I'm waiting for Triton Sample Return.


Teaching an astronomy class by Frigate - Tue, 24 Jan 2017 17:29:35 EST ID:CtuYLr3e No.56766 Ignore Report Reply Quick Reply
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So next week, I have been given the opportunity to teach astronomy (sadly only stars and galaxies) and I need to add some stuff to it. I could go as hard as I want on these freshmen, so what should I include?
6 posts omitted. Click Reply to view.
>>
Tycho Brahe - Sat, 04 Feb 2017 19:11:45 EST ID:Gsa9fLd4 No.56779 Ignore Report Quick Reply
>>56778
Hardly every bit as likely. There is no alternative model that can currently explain redshift and the uniformity of the CMB not to mention dozens of other observations.
>>
Irwin Shapiro - Tue, 07 Feb 2017 19:21:17 EST ID:nHQDeeId No.56780 Ignore Report Quick Reply
Show them how to find andromeda
>>
Joseph Taylor Jr. - Fri, 10 Feb 2017 20:16:33 EST ID:4yc+FRR6 No.56782 Ignore Report Quick Reply
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>>56767
That just sent me on a fun little side quest, thank you.
>>
Joseph-Louis Lagrange - Thu, 16 Feb 2017 12:33:23 EST ID:M/g1akbS No.56786 Ignore Report Quick Reply
Well, OP, How did it go??
>>
George Gamow - Thu, 16 Feb 2017 22:51:43 EST ID:U3oyeBRN No.56787 Ignore Report Quick Reply
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>>56766

Random Space Fact youtube videos from Dr. Bruce Betts


Extreme blazar thread by William Hartmann - Mon, 30 Jan 2017 14:35:44 EST ID:dz7Zv84F No.56774 Ignore Report Reply Quick Reply
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https://www.nasa.gov/feature/goddard/2017/nasas-fermi-discovers-the-most-extreme-blazars-yet

Fuck yeah those black holes are massive


Aliens by Mars - Sun, 16 Mar 2014 20:44:47 EST ID:Jzd78Ub0 No.53216 Ignore Report Reply Quick Reply
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Yo guys. I just had an opifany or what you call it(english is not my first language), if you consider that ufos really exists and the are flying in the sky all the time but why wont they communicate? Then it hit me, we would have done the same, using Rovers! Basically the ufos we see are probably machines flying about and taking pictures and samples of earth. They dont care that we see them, they obviously treat us as beings not worthy to be spoken to. I think its kind of creepy
53 posts and 2 images omitted. Click Reply to view.
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Karl Swarzchild - Sat, 28 Jan 2017 04:20:34 EST ID:SD/dK0pb No.56770 Ignore Report Quick Reply
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>quintuple post followed by triple post followed by triple post
>>
Roger Penrose - Sat, 28 Jan 2017 16:52:21 EST ID:gmm1Ygns No.56771 Ignore Report Quick Reply
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Let this thread die, ffs.
>>
Kip Thorne - Thu, 02 Feb 2017 03:39:11 EST ID:10QI3ruX No.56776 Ignore Report Quick Reply
>>56771
Gonna have to agree, nb. No bueno. Was a nice read and all but I'm not gonna turn around and just start speculating wildly. Not that it isn't fun.But still. There is no way to put together an alien mind other than wild speculation. So there's not much to it as is.
>>
Friedrich Bessel - Fri, 10 Mar 2017 12:22:11 EST ID:bbe1VMqZ No.56856 Ignore Report Quick Reply
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Well while we no-bump it back to oblivion maybe we should post some pictures.
>>
Fred Hoyle - Wed, 12 Apr 2017 23:46:48 EST ID:vwJ5gIk/ No.56912 Ignore Report Quick Reply
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nb


Gas Station by MOON FUEL - Sat, 17 Dec 2016 00:07:43 EST ID:3JvngLEe No.56726 Ignore Report Reply Quick Reply
File: 1481951263097.jpg -(106773B / 104.27KB, 720x480) Thumbnail displayed, click image for full size. 106773
Right now, I'm working on opening a gas station in low orbit around the moon, mostly refueling for interplanetary & deep space exploration. It'll have mechanics on site, parking on the dark side, though a bag of doritos will be $70 and a diet coke will be $14, you'll thank me when you come through. The air force 109 airlift is testing our tech in their fuel depot on the south pole. So I'm still going to come back to earth quarterly to visit the black bear sanctuary that I work at, but they've been getting so used to human food that they're getting pretty aggressive when I see them. Accually I've been pretty good about being able to chase bears out of the front yard, just by waving a broom and yelling, but my parents were out there the other day and ran when they saw our bear, and the little guy chased them. That really gave my parents a shock!
So, tldr; space won't kill me, the planet won't burn, we'll just leave it to the bears and other fluffy animals.
1 posts and 1 images omitted. Click Reply to view.
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Robert Dicke - Sun, 18 Dec 2016 07:11:00 EST ID:gmm1Ygns No.56728 Ignore Report Quick Reply
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Will you accept charons as payment, or just he-3?
>>
Irwin Shapiro - Sun, 18 Dec 2016 16:23:22 EST ID:rszf0FN0 No.56729 Ignore Report Quick Reply
What about me I can only pay in hiffwe?
>>
bob - Mon, 19 Dec 2016 02:09:33 EST ID:YR8vKebs No.56730 Ignore Report Quick Reply
derp
>>
Stephen Hawking - Sat, 14 Jan 2017 23:54:55 EST ID:veR+j0aW No.56759 Ignore Report Quick Reply
hey man I'll take a pack of zigzag blues, and a lighter too.
>>
Margaret Burbidge - Sat, 21 Jan 2017 22:04:37 EST ID:1xERvVrq No.56762 Ignore Report Quick Reply
>>56729
>pay in hiffwe?
is that like dogecoin?


Directly Imaging Planets by Kip Thorne - Sat, 12 Nov 2016 10:31:11 EST ID:L+GCCa0j No.56654 Ignore Report Reply Quick Reply
File: 1478964671170.jpg -(25943B / 25.33KB, 577x619) Thumbnail displayed, click image for full size. 25943
Hey guys. Good Morning. We can see other planets directly now.

http://www.universetoday.com/131903/princeton-team-directly-observes-planets-around-nearby-stars/

https://youtu.be/tbu1l672uLc?t=2171

Now we can start getting spectra and figuring out what's out there.
>>
Henrietta Levitt - Sat, 12 Nov 2016 17:10:33 EST ID:rszf0FN0 No.56655 Ignore Report Quick Reply
Whao. I didn't expect us to get something like this this fast. I thought we were going to be stuck reading the tea leaves of Kepler mission transits for decades. Go team human!
>>
Heinrich Olbers - Mon, 14 Nov 2016 08:54:36 EST ID:1q2X8R/n No.56656 Ignore Report Quick Reply
>>56654
This news is really exiting, and im glad you posted this but that video is private you massive wonk
>>
Bruon Rossi - Mon, 14 Nov 2016 10:38:13 EST ID:L+GCCa0j No.56658 Ignore Report Quick Reply
>>56656

Shit, it wasn't private when I posted it. Maybe the video was moved or something. Here's a working link: https://www.youtube.com/watch?v=rCP3rgVj1c0&t=2171

Sorry bud.
>>
Edmond Halley - Sun, 08 Jan 2017 06:18:31 EST ID:LnHMc7oC No.56750 Ignore Report Quick Reply
>>56658
damn they're all just trying to sound smarter than each other and it's kind of taking away from learning about the whole thing


Star Wreck by Roger Penrose - Thu, 01 Dec 2016 05:49:18 EST ID:eoz06Vb6 No.56698 Ignore Report Reply Quick Reply
File: 1480589358801.gif -(16062B / 15.69KB, 304x234) Thumbnail displayed, click image for full size. 16062
Finnish SciFi..

http://onnellinenhauskaablogi.blogspot.ca/2016/11/star-wreck-in-pirkining.html


Kessler syndrome, ablation cascades? by Concerned Galactic Citizen Commission - Mon, 14 Nov 2016 09:20:43 EST ID:1q2X8R/n No.56657 Ignore Report Reply Quick Reply
File: 1479133243854.jpg -(102142B / 99.75KB, 640x640) Thumbnail displayed, click image for full size. 102142
Our planet has a steadily growing shell of orbital debris. This space junk is most concentrated in low earth orbit band. Currently there are somewhere over 1,100 active Gov't and private satellites in orbit, as well as over 2000 that have ceased functioning.
That's just the satellites, as it is estimated that there are over 600,000 pieces of bullshit between 1 and 10 CM just waiting to blow a bunch of holes in any given mission.
Now, if a large enough object were to collide in LEO, or some kind of explosion, these debris objects will begin colliding, creating shrapnel, and impacting MORE objects in a runaway feedback reaction.
This gives us a number of problems, the first being that it totally kills any launch viability for the foreseeable future as well as destroying all the satellites we already have in orbit. The other major problem is that as these thousands upon thousands of objects get kicked around much like atoms in a nuclear chain reaction, a good number of them will de-orbit and enter earth atmosphere causing heating due to air friction. That is bad for obvious reasons.
So /sagan/ how do we take preventative actions against this? Do we even need to worry? what would a post-cascade earth be like?
2 posts omitted. Click Reply to view.
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Riccardo Giacconi - Tue, 15 Nov 2016 06:45:44 EST ID:tQX5ylFX No.56661 Ignore Report Quick Reply
>>56657
https://www.watchcartoononline.io/anime/planetes

have fun OP
>>
William Lassell - Tue, 15 Nov 2016 23:11:16 EST ID:ybUJp2Le No.56662 Ignore Report Quick Reply
Get INTERPOL on this, immediately.
>>
William Fowler - Wed, 16 Nov 2016 13:32:50 EST ID:YHjXylC8 No.56663 Ignore Report Quick Reply
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>>56661
I wanted to like that so much just for the realistic setting, but holy fuck the dialogue, characters, and unnecessary cutesy Japanese shit randomly crammed in is just too cringeworthy.
It's just highschool drama, but japanese and in space.
>>
William Lassell - Sun, 20 Nov 2016 04:15:45 EST ID:tQX5ylFX No.56664 Ignore Report Quick Reply
>>56663
the high school shit gets real BTFO later on. it's part of the arc deal with it for a few eps
>>
Mike Brown - Mon, 21 Nov 2016 10:03:54 EST ID:89x/mOqK No.56669 Ignore Report Quick Reply
lookin pretty clean on google maps


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