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420chan is Getting Overhauled - Changelog/Bug Report/Request Thread (Updated April 10)
SpaceEngine/Universe Sandbox Thread! Ignore Report View Thread Reply
Cosmobud - Mon, 18 Sep 2017 22:41:08 EST ID:1NT/Ijtb No.57022
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Why isn't there one? Post your awesome finds, explosions, super novae, whatever! OP image will be from Universe Sandbox, I'll post another from Space Engine.
>>
Cosmobud - Mon, 18 Sep 2017 22:52:10 EST ID:1NT/Ijtb No.57023 Ignore Report Reply
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>>57022
>>
Walter Adams - Fri, 22 Sep 2017 19:44:24 EST ID:3hL9HQte No.57026 Ignore Report Reply
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>>57022
>>57023
>>57024
tfw no space engine VR support yet
>>
Harlow Shapley - Sat, 23 Sep 2017 02:26:00 EST ID:ur3W8pPa No.57027 Ignore Report Reply
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Not sure where this was.


Cassini Ignore Report View Thread Reply
Edward Barnard - Wed, 26 Apr 2017 09:23:19 EST ID:rmFM08wB No.56925
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No Cassini thread? Think we'll find anything we weren't expecting in dem rings?
7 posts and 3 images omitted. Click View Thread to read.
>>
Paul Goldsmith - Wed, 19 Jul 2017 14:04:24 EST ID:yxm0fECC No.56981 Ignore Report Reply
>>56977
shouldn't a bunch of scientists be able to at least count properly?
>>
John Wheeler - Thu, 14 Sep 2017 23:31:42 EST ID:CZNpyEE2 No.57019 Ignore Report Reply
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Goodnight sweet prince
>>
Charles Messier - Mon, 18 Sep 2017 15:15:40 EST ID:HLehYNUW No.57021 Ignore Report Reply
>>56977
Fraisier Cain is that you?


Other worlds Ignore Report View Thread Reply
William Herschel - Tue, 08 Nov 2016 04:19:55 EST ID:FFHdMrF/ No.56642
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Do you think we will be capable to leave our solar system one day? Or that getting even to the closest star is impossible.
11 posts and 2 images omitted. Click View Thread to read.
>>
Stephen Hawking - Fri, 25 Aug 2017 23:54:14 EST ID:p1UqQx6T No.57012 Ignore Report Reply
>>56644
The budget is what makes it impossible. As such, humans don't deserve to leave. Money and the idea of it holds us back more than people will ever realize. If man would just stop being selfish and/or trying to control others, we would be so far ahead. Those that want to waste away would be allowed to and those that want to do something great would be able to, because without money, the only thing holding you back would be yourself. In this life, it's both other people and money.
>>
Clyde Tombaugh - Fri, 01 Sep 2017 17:36:46 EST ID:unNII3om No.57014 Ignore Report Reply
>>57012

Only that doing anything of the high-tech sort demands a huge cooperation between people. The guys who build the constituent parts of the rockets, how do they eat without bartering something for their work? How do the scientists eat without bartering something for their work?
>>
Verty - Wed, 13 Sep 2017 01:08:39 EST ID:VRvuffr/ No.57016 Ignore Report Reply
We won't be able to go anywhere important until we figure out how to fold space-time, which some aliens already have as I saw.


Books! Ignore Report View Thread Reply
William Lassell - Fri, 28 Jul 2017 19:52:00 EST ID:CtWYD6pG No.56988
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Can you recommend me soke books on the universe in general. Like books on astrophysics , black holes or planets. Thank you.
>>
Bernhard Schmidt - Wed, 16 Aug 2017 23:44:30 EST ID:nRjWggLk No.57001 Ignore Report Reply
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>>56988


The Night Sky. Ignore Report View Thread Reply
George Herbig - Thu, 06 Jul 2017 19:26:48 EST ID:5rTlMpAv No.56975
File: 1499383608371.jpg -(818025B / 798.85KB, 1920x1271) Thumbnail displayed, click image for full size. 818025
It was late august and the skies were perfect out in the cornfields of Nebraska,
It was the darkest I've ever seen, I couldn't see my hand in front of me, let alone the stalks.

After about half an hour of stumbling through the field trying to find my spot, (a clearing that my friend used to grow weed) I finally stumbled upon a small trail that led to the clearing.

In the clearing there was a trailer, a lawnchair, a cooler and a telescope. I turned on my lantern and went into the trailer. There were stalks of weed hanging on clotheslines as well as a few pills scattered on a table with a note that said "help yourself", with a winky face alongside a condom.

I thought it was a prank, but I thought I might as well so I took the pills all at once and shaved off a nug branch of uncured weed and smoked it the best I could. Anyway I got out my telescope and used my night-sky app on my phone to find the planets (yeah I know, I'm lazy).

As I was focusing in on Saturn I noticed my vision started to blur a bit. I thought at first the lense was just out of focus but I soon found that something was happening. I continued my search anyway, the best I could until I could no longer keep up.

I decided to just chill on a tarp and watch the stars instead, see If I could make out the ISS and other satellites. I started thinking about how those stars are actually clusters of galaxies that are probably gone, it made me sad but then I felt something.

My dick was hard as a rock., On top of that the stars wouldn't stay still. It was bothering the fuck out of me until it didn't. I started to see my own constellations, they turned into titties and even full on line-porn.
Comment too long. Click here to view the full text.
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Joseph Taylor Jr. - Sun, 23 Jul 2017 22:19:45 EST ID:s0XmRX5r No.56983 Ignore Report Reply
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havent heard that one before


oh cool Ignore Report View Thread Reply
Pierre-Simon Laplace - Tue, 18 Jul 2017 14:04:36 EST ID:T69KfNA1 No.56980
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imagine what planet discovering when listening to thids
https://www.youtube.com/watch?v=7vj-3bafIMI


black holes Ignore Report View Thread Reply
analnonymphus - Sun, 25 Jun 2017 08:49:44 EST ID:M9cvTU1A No.56960
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so cern was built and there were quite a few expermiments done there, now i am wondering why we are shooting particles through earth "for different reasons" are we measuring for a difference in gravity? also i read an really awkward article about alot of stars and planets naturally containing black holes (sounds like the cancer lie to me - its natural and in every body in low amounts- and i have cancer and know how i got it - chemically) so whats goind on here? possibly does anyone know the maths to how fast a black hole grows? just asking ...
3 posts omitted. Click View Thread to read.
>>
analnonymphus - Sun, 25 Jun 2017 17:15:26 EST ID:yhLhjf2W No.56965 Ignore Report Reply
just wondering how a miniature black hole in earths core would start feeding, would it be particles and atomdust from space? would it already initially be molten metals?
>>
analnonymphus - Sun, 25 Jun 2017 17:17:20 EST ID:yhLhjf2W No.56966 Ignore Report Reply
by particles i mean bosons and fermions
>>
Henry Draper - Thu, 29 Jun 2017 01:38:31 EST ID:kjgELPni No.56968 Ignore Report Reply
>>56966
You're reaching into subject matter that I think you probably need more reference knowledge for to be able to integrate fully. Probably best to just not worry about such things in that case.
But, the idea that there could be microscopic black holes capable of passing through the earth is just from one study by one physicist, as a way to explain something that probably has a much simpler explanation i.e. the LHC doesn't generate micro black holes simply because the LHC isn't capable of generating micro black holes . The accepted explanation concerning black holes in the standard model is that they continually lose mass due to Hawking radiation, and thus eventually evaporate completely, so by most physicists estimation, long lived subatomic scale black holes don't exist.

If there were a black hole in the center of the earth, then the center of the earth would fall into its event horizon, which would subsequently expand. In short order, the entire earth would be within the black hole. Anything that comes into physical contact with the event horizon becomes a part of the black hole, and since the center of the earth is completely pressurized with no vacuous space, it would consume the earth more or less instantaneously from our perspective, from the inside out.

The amount of the mass that subatomic particles, that could pass through such an object that weren't already part of the earth's mass -- like neutrinos burrowing through from the sun, would contribute to the total mass of an earth-consuming black hole would be vanishingly negligible, more or less equivalent to the number of neutrinos that pass through the earth during the time it took the black hole to consume it, (which would again, would on the order of seconds, perhaps minutes) pico grams of substance compared to the earth's 5x10^24 Kgs.


SpaceX Ignore Report View Thread Reply
Gerard Kuiper - Mon, 21 Dec 2015 21:08:08 EST ID:UJHLFL7d No.55894
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WE FUCKING DID IT
71 posts and 20 images omitted. Click View Thread to read.
>>
Samsara Siddhartha - Fri, 16 Jun 2017 09:36:59 EST ID:mhvoJT06 No.56954 Ignore Report Reply
>>55894
Hot off the presses! Freely available until July 5th! <spoiler>Unless you http://sci-hub.io/</spoiler>
http://online.liebertpub.com/doi/full/10.1089/space.2017.29009.emu
>>
Samsara Siddhartha - Fri, 16 Jun 2017 09:38:50 EST ID:mhvoJT06 No.56955 Ignore Report Reply
>>56954
Fail!
also this https://arstechnica.com/science/2017/06/air-force-budget-reveals-how-much-spacex-undercuts-launch-prices/
>>
Samsara Siddhartha - Mon, 26 Jun 2017 11:16:24 EST ID:VzPcpzRp No.56967 Ignore Report Reply
The winning continues
https://www.theverge.com/2017/6/25/15870934/spacex-second-launch-weekend-rocket-landing-success-falcon-9-landing


military equipment Ignore Report View Thread Reply
Vesto Slipher - Sat, 15 Apr 2017 19:18:53 EST ID:/DjOl0ut No.56916
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i understand the weight involved but their are multiple ways to accomplish this

(also i may be missing information on certain things)

with the miscellaneous equipment that is obsolete or ... take an electromagnet to swoop the pieces and clean the atmosphere.. *(my mind was on this)

secondly i think that while it may be applicable to take a large hook and anchor to something to even make some kind of "elevator" - to utilize this to even lift some military equipment - prefabricated buildings... almost anything

a tank is something that came to mind... a submarine would almost work also.. in zero gravity

plus with that.. it comes to understand the problems with entanglement... but also to cheaply move things from station to station on a rope ... much information should be held... but again i don't know who reads these forums

but why not
6 posts omitted. Click View Thread to read.
>>
Alan Guth - Tue, 25 Apr 2017 01:10:37 EST ID:M/g1akbS No.56924 Ignore Report Reply
what the actual hell am I reading in this thread?
>>
Emelianegro !2iyFNTAIpU - Sat, 29 Apr 2017 13:17:59 EST ID:sm4m2KiS No.56929 Ignore Report Reply
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>>56916
>>
Subramanyan Chandrasekhar - Wed, 17 May 2017 22:54:59 EST ID:ho0i+8BY No.56941 Ignore Report Reply
>>56916

Awesome. 5* post. Lost it at

>rope


EM DRIVVVVVVVVVVE Ignore Report View Thread Reply
Joseph-Louis Lagrange - Sun, 20 Nov 2016 17:41:15 EST ID:rszf0FN0 No.56665
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HOLY SHIIIIIIIIIIIIIIIIIII

So apparently after decades of people trying to debunk it and call it pseudoscience, NASA has confirmed the Shawyer EM Drive actually works, producing thrust via microwaves using no propellant, apparently violating the principle of equal and opposite reaction:
http://www.sciencealert.com/it-s-official-nasa-s-peer-reviewed-em-drive-paper-has-finally-been-published

The authors suggest that perhaps the long-dead pilot-wave/Bohmian interpretation of Quantum Mechanics is now a contender again thanks to this new evidence. The microwaves 'push off' of the quantum vacuum, preserving Newton. But if pilot-wave is the true QM, that means not only that alternate realities exist, but that we see them as real effects in our world! (i.e. in the generation of interference patterns in the double-slit experiment. But surely this is but the most minor influence this generates, and probably only the easiest to notice, since in Bohmian mechanics the wave function that governs any given particle system spans the entire universe.)

NASA's totally unoptimized EM drive could get us to Mars in a tithe of the time of even Musk's proposal, with a ship a fraction of the mass ('cause no propellant.) It's bottle popping time /sagan/!
64 posts and 14 images omitted. Click View Thread to read.
>>
Kip Thorne - Thu, 02 Feb 2017 03:47:10 EST ID:10QI3ruX No.56777 Ignore Report Reply
>>56758
Damn, all I wanted was unlimited energy and mankind to conquer the universe. This whole thing sounded so star trek at first, but now all my hopes are getting fucking dashed. I just wanted to travel the universe, is that so bad?
>>
Henry Russell - Tue, 28 Feb 2017 15:32:15 EST ID:3rYafGRG No.56844 Ignore Report Reply
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Sounds pretty abstract.
>>
Henrietta Levitt - Sat, 13 May 2017 15:28:22 EST ID:8y/A2lll No.56937 Ignore Report Reply
so what you are telling me is humans are going to travel the stars powered by

>implying

to seed their memes across the galaxy?


thowing up in your helmet Ignore Report View Thread Reply
Johann Encke - Thu, 02 Mar 2017 18:37:45 EST ID:yfFUwunc No.56847
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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/
5 posts and 1 images omitted. Click View Thread to read.
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Anders Angstrom - Fri, 31 Mar 2017 02:29:16 EST ID:UUK/Eqa/ No.56898 Ignore Report 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 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 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 Ignore Report View Thread Reply
Johann Encke - Thu, 23 Mar 2017 18:41:02 EST ID:pYbb5iMl No.56876
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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?
14 posts and 1 images omitted. Click View Thread to read.
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Paul Goldsmith - Wed, 05 Apr 2017 16:12:44 EST ID:7jcVAyVz No.56906 Ignore Report Reply
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>>56905
>>
Ejnar Hertzprung - Wed, 12 Apr 2017 00:12:46 EST ID:TSBuLBRU No.56910 Ignore Report 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 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 Ignore Report View Thread Reply
Georges-Henri Lemaitre - Tue, 07 Mar 2017 10:24:21 EST ID:d9ijPul/ No.56851
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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?
15 posts and 1 images omitted. Click View Thread to read.
>>
Carl Seyfert - Wed, 22 Mar 2017 06:55:46 EST ID:d9ijPul/ No.56871 Ignore Report 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 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 Reply
>>56908
You don't understand how wells work do you?


Dark matter matters Ignore Report View Thread Reply
Clyde Tombaugh - Wed, 09 Nov 2016 03:09:08 EST ID:zHoQtF+M No.56645
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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.
23 posts and 5 images omitted. Click View Thread to read.
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Bruon Rossi - Mon, 27 Feb 2017 13:16:01 EST ID:FoZr+PSB No.56843 Ignore Report 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 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 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.


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