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Red Dwarf ayy lmaos by William Hartmann - Mon, 15 Jan 2018 13:34:12 EST ID:y3vStdZD No.57154 Ignore Report Reply Quick Reply
File: 1516041252879.jpg -(66050B / 64.50KB, 1024x768) Thumbnail displayed, click image for full size. 66050
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
8 posts omitted. Click Reply to view.
>>
Hannes Alven - Thu, 08 Feb 2018 19:43:07 EST ID:NyLhIW/E No.57182 Ignore Report Quick Reply
>>57180
>> the interaction between a star and a planet (gravity) does not affect the electromagnetism of the planet in question
Well, no, gravity isn't the only fundamental force that causes interaction between stars and planets. We are absolutely electromagnetically affected by our star, we are bathed in its EM radiation continuously, but that's not at all the reason we have an magnetic field on earth, and I never suggested it was.

I suggested that stars with low metallicity necessarily have planetary systems with low metallicity, and that you can't have a magnetic planet without it being composed of a sufficient proportion of magnetic metals (you need other things too, like a sufficient mass, which is apparently why Mars' magnetic field collapsed.) The relationship between a star's composition and its planets' magnetism occurs during the proto-stellar phase, when the star is accumulating whatever heavy elements will go into its accretion disk. Only if enough magnetic metals are present will there be a planet with sufficient mass to maintain a liquid core of cobalt, nickel or iron. After the planetary system has formed, the electromagnetic interaction between star and planets is limited to effects directly caused by the electromagnetic radiation of the star and how it interacts with the electromagnetic field, if any, of its planets, which sustain on their own merits after that point.

In sort you either misunderstood my post or yourself don't have a firm understanding of how the four fundamental forces relate to the physics of the formation of star systems and planets.
>>
Stephen Hawking - Sat, 10 Feb 2018 15:23:04 EST ID:p73EfNkl No.57184 Ignore Report Quick Reply
>>57182

ok ok i guess if you want to take it back to the actual formation of the planet, which is a function of the gravitational force between the star and planetoid, then fine, it has an eventual determining effect on the existence and/or strength of the planet's electromagnetic field. however i didn't think you meant it in a historical sense, but rather a consistent determination of the EM from G which i was saying is not true.
>>
Charles Bolton - Tue, 13 Feb 2018 12:18:11 EST ID:4uIlxD// No.57190 Ignore Report Quick 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 ID:4uIlxD// No.57191 Ignore Report Quick 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 ID:m3P6k9jA No.57193 Ignore Report Quick Reply
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>>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. by Henrietta Levitt - Tue, 06 Feb 2018 17:11:41 EST ID:unNII3om No.57169 Ignore Report Reply Quick Reply
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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.
6 posts and 2 images omitted. Click Reply to view.
>>
Antony Hewish - Thu, 08 Feb 2018 14:04:03 EST ID:hGyQlc1t No.57177 Ignore Report Quick Reply
For asteroid mining you need fusion or cheap ass solar.
And possibly a way to make metallic hydrogen fuel.

Moving stuff is still expensive as fuck in space because of the fucking rocket equation,.

That said I'm impressed by the Falcon Heavy, but has less umpf that the Saturn V had (and equivalent lifting capability to low earth orbit doesn't count)
The thing is the Saturn V could have done the one thing the falcon heavy was _optimized_ for as a side note. Lookup what the Lunar Lander did weigh.

The Falcon Heavy couldn't redo Apollo.
>>
Antony Hewish - Thu, 08 Feb 2018 14:11:50 EST ID:hGyQlc1t No.57178 Ignore Report Quick Reply
>The Falcon Heavy couldn't redo Apollo.
This also means it can't send stuff to mars on a fast transfer orbit. That tesla in space will orbit the sun several times before it gets to mars.
>>
Harlow Shapley - Thu, 08 Feb 2018 17:18:49 EST ID:p73EfNkl No.57179 Ignore Report Quick 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)
>>
Hannes Alven - Thu, 08 Feb 2018 19:31:02 EST ID:NyLhIW/E No.57181 Ignore Report Quick 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.)
>>
William Herschel - Fri, 09 Feb 2018 23:52:48 EST ID:coC9H9eG No.57183 Ignore Report Quick Reply
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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 by Bernard-Ferdinand Lyot - Sat, 16 Dec 2017 14:49:08 EST ID:unNII3om No.57129 Ignore Report Reply Quick Reply
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https://www.nasa.gov/mission_pages/juno/images/index.html

These pictures alone are worth the 1 billion dollars of the mission.
>>
Edwin Hubble - Sat, 20 Jan 2018 00:13:35 EST ID:GzPfXXE4 No.57159 Ignore Report Quick Reply
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>>57129
Totally worth it. Fuckin love jupiter
>>
Galileo Galilei - Sat, 20 Jan 2018 07:34:49 EST ID:8caD3Z7Z No.57161 Ignore Report Quick Reply
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>>57159
Nasa bitches be trippin


Revolutionary new theory disproving gravity and our understanding of the cosmos by William Lassell - Sun, 26 Nov 2017 13:07:45 EST ID:Wzm4xeu3 No.57104 Ignore Report Reply Quick Reply
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https://www.youtube.com/watch?v=xDSS5k-105M

What if the heavens we have gazed in wonder for so long are not so vast...but in fact smaller than the landmass we inhabit?

Unlike the ridiculous flat earth theory, which makes no sense, this new theory makes a lot of sense, and not only that, it manages to combine science with religion in a rational, logical way.
8 posts and 2 images omitted. Click Reply to view.
>>
Kiyotsugu Hirayama - Tue, 05 Dec 2017 22:13:02 EST ID:2ov/AXi5 No.57120 Ignore Report Quick Reply
>>57104
Sorry chap, that didn't disprove anything, and you're a fucktard!
>>
Edward Pickering - Wed, 06 Dec 2017 11:03:40 EST ID:pyme3SEs No.57121 Ignore Report Quick Reply
>>57120

Disprove a bag of shit, onk.
>>
Cecelia Payne-Gaposchkin - Wed, 06 Dec 2017 16:12:29 EST ID:unNII3om No.57122 Ignore Report Quick Reply
>>57121

Easy. Who would seriously put shit in a bag besides dog-owners?

Check mate nb
>>
Wilhelm Beer - Mon, 01 Jan 2018 12:27:22 EST ID:eygzYfFg No.57141 Ignore Report Quick Reply
Is this the "Elon Musk is Satan" guy that spammed /high/ full of his schizophrenic retard shit a few months ago?
>>
Nicolaus Copernicus - Mon, 05 Mar 2018 12:39:55 EST ID:ej0yxAjW No.57230 Ignore Report Quick Reply
I can here to check this out from a complaint thread on /420/ to see if it was true.. Gave me a good chuckle. Thanks 420chan.


Astronomy Club by Ejnar Hertzprung - Wed, 13 Sep 2017 12:02:26 EST ID:dWt9NTso No.57017 Ignore Report Reply Quick Reply
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I'm trying to make an astronomy club but I don't know what it would be about or what to do. Everyone else who likes astronomy are just shy like me and we all refuse to talk. Logically I know that the club show be at night because astronomy but what do you think I should do at such a club. Thank you
>>
Dr. Mario !gWLn19/oKs - Thu, 14 Sep 2017 21:49:37 EST ID:9UftK+wR No.57018 Ignore Report Quick Reply
>>57017
definitely smoke weed together. lots of weed. thats a given
>>
Jocelyn Bell - Sat, 16 Sep 2017 12:26:08 EST ID:2H001r1f No.57020 Ignore Report Quick Reply
>>57018
Alrighty !
>>
Karl Swarzchild - Thu, 21 Sep 2017 10:46:21 EST ID:sywMqW4i No.57025 Ignore Report Quick Reply
>>57017
>the club should be at night
>what do you think I should do at such a club

well gee, ill tell you what i think
>>
Galileo Galilei - Sat, 23 Sep 2017 21:07:05 EST ID:7bk1TGPO No.57028 Ignore Report Quick Reply
maybe you could look at stars and talk about them
>>
Tycho Brahe - Fri, 22 Dec 2017 01:13:32 EST ID:mZKzn5Lt No.57133 Ignore Report Quick Reply
>>57017
in my highschool astronomy club we participated a lot in SETI


https://www.celestron.com/products/powerseeker-127eq-telescope by Joseph von Fraunhofer - Sun, 03 Dec 2017 04:35:05 EST ID:UEOi/cKA No.57111 Ignore Report Reply Quick Reply
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Im looking for a telescope in the 150-180 range for my cousin
can someone knowledgable help me
https://www.celestron.com/products/powerseeker-127eq-telescope

some of these have more "zoom" I am retarded but are some are cheaper and some have less and are more expensive so I don't get it?
>>
Jericho !.iRAtomic2 - Fri, 15 Dec 2017 12:14:31 EST ID:Wnqom/n1 No.57128 Report Quick Reply
Go for something with a larger aperture size. This collects more light, allowing lenses with more zoom to be used without everything fading out.
I'd recommend something with a 4"+ aperture. It will come with at least a 40mm eyepiece, and if your cousin wants, they can get other lenses that will zoom more.


You don't understand galactic scales; Relativity is a bitch thread by Kiyotsugu Hirayama - Thu, 04 May 2017 18:10:19 EST ID:unNII3om No.56931 Ignore Report Reply Quick Reply
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So imagine you have two cannons firing their cannon balls away from each other, and their muzzle velocity is the speed of light.

You'd think the relative speed of one cannon ball to the other would be 2x the speed of light, right?

Nope. The equation for relative speed between two objects looks like this:

>v1+2=v1+v2/(1+v1v2/c^2)

Where v1 and v2 are the speeds of the two cannon balls and c is the speed of light.

So as the velocity of the cannon balls approaches the speed of light, their own speed doesn't matter and the limit of light speed is dominant. Relative speed of 2x speed of light is thus impossible.

Or in other words: wat.


You guys got some other relativistic mind-blowers?
20 posts and 2 images omitted. Click Reply to view.
>>
William Hartmann - Mon, 11 Sep 2017 13:15:57 EST ID:kRyBQtrI No.57015 Ignore Report Quick Reply
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>>56993
>WikiHow
But you're helpful otherwise.
>>
Fred Hoyle - Sun, 15 Oct 2017 20:38:36 EST ID:lQ9q0NgK No.57061 Ignore Report Quick Reply
>>56942
>causal violations are not a problem in relativity. They are in fact expected and on multiple levels
I would disagree with this sentiment. Although violations of causality certainly may be possible, I would argue that the general (excuse the pun) theories of S.R. and G.R. rely heavily on the notion that causality is inviolable. In example of separate observers witnessing events, you are confusing causality with simultaneity. This is only possible for events that are causally separated (spacelike). If events can be perceived as simultaneous in some reference frame S, then they must be causally separated if there is nonzero distance between them (in S). Special relativity and causality allows you to boost to some frame S' with nonzero velocity relative to S such that the events occur out of order, however no matter how fast you go in S', the events will never occur in each other's light cone without exceeding the speed of light, and therefore cannot be causally related. tl;dr: violating simultaneity is not violating causality.

>There's a limit to the rate of causality, that makes the speed of light, but causality itself is not necessarily inviolable
Central to relativity is the notion that the speed of light is the same in any reference frame and cannot be exceeded. As you alluded to here, causality is defined by the speed of light (if event b occurs before light from event a could have reached it, then a cannot have caused b because the information that a has occurred will reach b after b happens). Therefore in order to violate causality, you must exceed the speed of light, which is forbidden in relativity.
With that said, that paper is certainly an interesting read, but it is investigating possible mechanisms of causal violation that would modify or extend the existing theories of relativity. It is well known that quantum mechanics and general relativity don't get along, and thus a theory of "quantum gravity" will have to violate some well established principals, but this is just the nature of science. I'm trying not to argue that causal violations are impossible, just that the notion that causal violations are expected by conventional relativity is …
Comment too long. Click here to view the full text.
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Jocelyn Bell - Thu, 02 Nov 2017 07:39:24 EST ID:eygzYfFg No.57072 Ignore Report Quick Reply
>>56933
Wromholes don't mess with time because you bend space. Time still flows through the wormhole.
>>
George Hale - Sat, 04 Nov 2017 17:29:49 EST ID:unNII3om No.57075 Ignore Report Quick Reply
>>57072

Um no? It's known as the one most likely way of traveling through time dude. Remember time and space are two sides of the some coin. You bend one you bend the other.
>>
Charles Bolton - Sun, 03 Dec 2017 16:31:39 EST ID:+kYrHA6N No.57114 Ignore Report Quick Reply
>>57072

then how did Tasha Yar have a daughter?


Ayy-lmao! A steroid! by Christiaan Huygens - Fri, 27 Oct 2017 23:01:24 EST ID:RH1VsRBv No.57067 Ignore Report Reply Quick Reply
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https://www.cnet.com/news/interstellar-asteroid-comet-a-2017-u1-pan-starrs-nasa-earth/

>All the asteroids and comets astronomers have ever spotted in our celestial neighborhood appear to come from somewhere else in the solar system and orbit the sun, just like Earth.

That is, until the University of Hawaii's Pan-STARRS 1 telescope last week discovered what appears to be the first ever seen "interstellar object" -- an asteroid (or maybe a comet) that escaped from the gravitational grasp of another star and fell through the roof of our solar system.

That makes the object currently designated A/2017 U1 an alien of sorts around our corner of the cosmos.

The foreign space-something is less than a quarter-mile (400 meters) across, but is moving super fast at 15.8 miles (25.5 kilometers) per second. That's over three times faster than Asteroid 2012 TC4, the rock that gave Earth a close shave earlier this month.

"This is the most extreme orbit I have ever seen," said Davide Farnocchia, at NASA's Center for Near-Earth Object Studies (CNEOS). "It is going extremely fast and on such a trajectory that we can say with confidence that this object is on its way out of the solar system and not coming back."
>>
Maximilian Wolf - Sun, 29 Oct 2017 03:25:09 EST ID:iHcy51j9 No.57068 Ignore Report Quick Reply
A little eerie.
>>
Nicolaus Copernicus - Fri, 10 Nov 2017 02:51:08 EST ID:XdfxkLaX No.57085 Ignore Report Quick Reply
Imagine the shit that goes faster than that tho.


Hey Nerds by Antony Hewish - Sun, 23 Jul 2017 18:26:46 EST ID:Fbpr3rrr No.56982 Ignore Report Reply Quick Reply
File: 1500848806452.png -(45948B / 44.87KB, 600x224) Thumbnail displayed, click image for full size. 45948
I was wondering why you guys post here? Aren't these boards ungodly slow? Wouldn't it be easier for you to just go to an actual forum for space discussion? Why wait so long for a reply from some drug addict about stars or whatever when you can probably get better information more quickly from somewhere else?

Not judging, just genuinely curious
11 posts and 1 images omitted. Click Reply to view.
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hokusai - Sat, 19 Aug 2017 11:26:42 EST ID:LIO8YU+/ No.57003 Ignore Report Quick Reply
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havent read the thread but i dont thing faster than light travel is possible the way it will be done is not by moving objects but consciousness around space outside time thats why i post here and not in a science forum
>>
Margaret Burbidge - Sun, 20 Aug 2017 05:14:34 EST ID:PovkMdyu No.57005 Ignore Report Quick Reply
Is there really any faster forum than a chance? I mean besides ones filled with terms like "social media"
>>
Kip Thorne - Thu, 12 Oct 2017 14:09:23 EST ID:KX/DxO6v No.57048 Ignore Report Quick Reply
>>56999

speed exists in relation to predetermined points on a coordinate system
>>
James Elliott - Thu, 12 Oct 2017 16:50:14 EST ID:unNII3om No.57050 Ignore Report Quick Reply
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>>57048

Space has no inherent coordinate system dude. This is like one of THE realizations of relativism.
>>
Kip Thorne - Thu, 12 Oct 2017 19:57:11 EST ID:KX/DxO6v No.57052 Ignore Report Quick Reply
>>57050

yep, very good. now let's break down relativism: that which is relative [to a given frame of reference]; i.e. you make up your own system as an observer, which will be different from every other observer's system. an object in motion in relation to another object in motion can only have a determinate speed (if we are serious about this conversation we should start using the term velocity, actually) within a predetermined system.


SpaceEngine/Universe Sandbox Thread! by Cosmobud - Mon, 18 Sep 2017 22:41:08 EST ID:1NT/Ijtb No.57022 Ignore Report Reply Quick Reply
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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 Quick Reply
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>>57022
>>
Walter Adams - Fri, 22 Sep 2017 19:44:24 EST ID:3hL9HQte No.57026 Ignore Report Quick 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 Quick Reply
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Not sure where this was.


Cassini by Edward Barnard - Wed, 26 Apr 2017 09:23:19 EST ID:rmFM08wB No.56925 Ignore Report Reply Quick Reply
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No Cassini thread? Think we'll find anything we weren't expecting in dem rings?
5 posts and 2 images omitted. Click Reply to view.
>>
Alan Guth - Thu, 13 Jul 2017 18:48:31 EST ID:unNII3om No.56978 Ignore Report Quick Reply
>>56977

Aw man, what a downer.
>>
George Herbig - Fri, 14 Jul 2017 03:51:43 EST ID:nRjWggLk No.56979 Ignore Report Quick Reply
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>>56977
>>
Paul Goldsmith - Wed, 19 Jul 2017 14:04:24 EST ID:yxm0fECC No.56981 Ignore Report Quick 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 Quick Reply
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Goodnight sweet prince
>>
Charles Messier - Mon, 18 Sep 2017 15:15:40 EST ID:HLehYNUW No.57021 Ignore Report Quick Reply
>>56977
Fraisier Cain is that you?


Other worlds by William Herschel - Tue, 08 Nov 2016 04:19:55 EST ID:FFHdMrF/ No.56642 Ignore Report Reply Quick Reply
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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.
9 posts and 2 images omitted. Click Reply to view.
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Subramanyan Chandrasekhar - Sat, 10 Jun 2017 16:28:00 EST ID:unNII3om No.56952 Ignore Report Quick Reply
>>56950

Just an interesting consequence of relativity: As you approach the speed of light, time slows down. While the trip might take decades or centuries from our perspective, it can take significantly less from the perspective of the travelers. With an efficient enough vessel, traveling to Alpha Centauri can theoretically be done without generation-ships.
>>
William Lassell - Fri, 23 Jun 2017 17:10:24 EST ID:iClpwVzv No.56958 Ignore Report Quick Reply
>>56952
Even without time dilation, Alpha Centauri isn't that far.
If we could accelerate at 1g halfway, then decelerate at 1g the other half, it would only take 6 years without time dilation (3.5 years with dilation).
That kind of acceleration is a tall order though.
At only one tenth of a g, it's still only about 13.6 years to an outside observer.
Google "relativistic star ship calculator". I like the one from convertalot.com
>>
Stephen Hawking - Fri, 25 Aug 2017 23:54:14 EST ID:p1UqQx6T No.57012 Ignore Report Quick 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 Quick 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 Quick 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.


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