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Author Topic: Space Thread  (Read 509346 times)
Ghambit
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Reply #105 on: October 19, 2012, 02:15:26 PM

Actually, considering time dilation it may take even LESS than 4yrs. at near light-speed; given the traveller's reference frame.  The theoretical warp drive limit is 10c so that'd take 2yrs. earth time for an object 20ly away, but the time inside the ship may be like 5 mins.
« Last Edit: October 22, 2012, 06:09:51 PM by Ghambit »

"See, the beauty of webgames is that I can play them on my phone while I'm plowing your mom."  -Samwise
Mosesandstick
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Reply #106 on: October 19, 2012, 03:38:19 PM

In the traveller's reference frame it will take him 4 years to travel 4 light years at the speed of light. From the traveller's reference frame the rest of the universe "slows" down as he reaches the speed of light.
cironian
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Reply #107 on: October 20, 2012, 07:00:39 AM

The "5 minutes of subjective time" is more in the area of going at 99.999% light speed. (Didn't check the actual numbers, so don't nail me down on the number of nines)

At 10c you'd run into far more fundamental problems with time, like travelling into the past and collapsing the universe.
Typhon
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Reply #108 on: October 20, 2012, 07:52:12 AM

In the traveller's reference frame it will take him 4 years to travel 4 light years at the speed of light. From the traveller's reference frame the rest of the universe "slows" down as he reaches the speed of light.

No.  Assume the traveler is moving at .99c. From the perspective of a person on Earth, they see it taking the traveler a little bit longer than 4 years to get there.  Earth also sees the traveler's clocks running 1/7th as fast as it did on Earth.

The traveler sees her own clocks moving at the same speed they always did, but she sees the distance between Sol and Alpha Centauri as being 1/7th of what they originally saw.  From the traveler's perspective, it's a shorter trip and it only takes 1/7 * 4 years to get there.
Mosesandstick
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Reply #109 on: October 20, 2012, 08:36:56 AM

My bad you're correct, but I'd add that the person travelling at 0.99c doesn't travel "4 light-years", they travel what we see as 4 light-years.
« Last Edit: October 20, 2012, 08:39:24 AM by Mosesandstick »
Lantyssa
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Reply #110 on: October 20, 2012, 06:39:27 PM

Funny, because my comment was based on what we're capable of now, not theoretically in umpteenth centuries after we've mastered FTL travel.

Hahahaha!  I'm really good at this!
Engels
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Reply #111 on: October 20, 2012, 11:50:35 PM

Well, no matter what, the nerd squad of F13 great grandchildren will be prepared. Love how an off hand comment meant to be a goof got analyzed to all heck. Love this board.

I should get back to nature, too.  You know, like going to a shop for groceries instead of the computer.  Maybe a condo in the woods that doesn't even have a health club or restaurant attached.  Buy a car with only two cup holders or something. -Signe

I LIKE being bounced around by Tonkors. - Lantyssa

Babies shooting themselves in the head is the state bird of West Virginia. - schild
pxib
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Reply #112 on: December 04, 2012, 10:44:10 AM

Not 'one for the history books' yet.

Curiosity found trace amounts of carbon and chlorine compounds, but not enough that NASA feels they can say for certain that they didn't arrive on board the rover or a meteor. Other than that statistically insignificant find, the Martian soil here seems composed of the same things as other samples elsewhere. Apparently this has led to NASA clamping down on allowing its scientists to say mysteriously optimistic things when they don't have data to back them up.

if at last you do succeed, never try again
Ghambit
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Reply #113 on: December 04, 2012, 04:44:21 PM

Yah, I dug deep enough into those experiments (which used the 1st of 59 sample containers) to find out the point of it was to sample the LEAST interesting and most prevalent soil on the planet.  It's really just a basic sampling of the very topmost soil, which is comprised largely of dust. (though they're getting rid of the 'dust data')    We can get excited when they start going back in time geologically and taking samples.  Till then, even if they get excited about topsoil stuff it's likely of little consequence given it's been exposed to current atmosphere.

Let them dig deeper 1st.
« Last Edit: February 21, 2013, 02:18:42 PM by Ghambit »

"See, the beauty of webgames is that I can play them on my phone while I'm plowing your mom."  -Samwise
pxib
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Reply #114 on: February 21, 2013, 12:54:50 PM


if at last you do succeed, never try again
pxib
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Reply #115 on: July 10, 2013, 10:20:02 AM

Curiosity took a billion pixel panorama before it set out on its year long, five mile trek to the base of Mount Sharp. Mars is brown.

if at last you do succeed, never try again
Ghambit
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Reply #116 on: July 10, 2013, 10:35:41 AM

... and has rox 'n stuff.
Really, more of a showoff of the camera tech. then anything else, which I gotta say is pretty striking once you zoom in on a target.

"See, the beauty of webgames is that I can play them on my phone while I'm plowing your mom."  -Samwise
Yegolev
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WWW
Reply #117 on: July 10, 2013, 02:12:59 PM

SPAAAAAAAACE

THREAAAAAAAAD

Why am I homeless?  Why do all you motherfuckers need homes is the real question.
They called it The Prayer, its answer was law
Mommy come back 'cause the water's all gone
Merusk
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Reply #118 on: July 10, 2013, 02:13:53 PM

Jan, Jayce, run!

The past cannot be changed. The future is yet within your power.
Yegolev
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Reply #119 on: July 10, 2013, 08:55:27 PM

Man, you get like a hundred points for that one.

Why am I homeless?  Why do all you motherfuckers need homes is the real question.
They called it The Prayer, its answer was law
Mommy come back 'cause the water's all gone
Surlyboi
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eat a bag of dicks


Reply #120 on: July 10, 2013, 09:29:44 PM

Deduct 40 nor not mentioning Blip.

Tuned in, immediately get to watch cringey Ubisoft talking head offering her deepest sympathies to the families impacted by the Orlando shooting while flanked by a man in a giraffe suit and some sort of "horrifically garish neon costumes through the ages" exhibit or something.  We need to stop this fucking planet right now and sort some shit out. -Kail
Yegolev
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Reply #121 on: July 10, 2013, 11:04:12 PM

We old people need to stick together.

Why am I homeless?  Why do all you motherfuckers need homes is the real question.
They called it The Prayer, its answer was law
Mommy come back 'cause the water's all gone
Stormwaltz
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Reply #122 on: July 10, 2013, 11:34:03 PM

Deduct 40 nor not mentioning Blip.

I award 40 quatloos for not mentioning Blip.

Nothing in this post represents the views of my current or previous employers.

"Isn't that just like an elf? Brings a spell to a gun fight."

"Sci-Fi writers don't invent the future, they market it."
- Henry Cobb
Merusk
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Reply #123 on: July 11, 2013, 05:50:18 AM

I was debating mentioning blip, or going for the SGC2C reference with Zorak and Moltar. 

The past cannot be changed. The future is yet within your power.
pxib
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Reply #124 on: July 24, 2013, 02:03:51 PM

Two views of the Earth and the moon, one from Saturn, one from Mercury:

if at last you do succeed, never try again
Khaldun
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Reply #125 on: October 18, 2013, 03:08:11 AM

Yegolev
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Reply #126 on: October 18, 2013, 10:26:15 AM

Great!  I won't have to worry about the 2038 Problem.

Why am I homeless?  Why do all you motherfuckers need homes is the real question.
They called it The Prayer, its answer was law
Mommy come back 'cause the water's all gone
Nevermore
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Reply #127 on: November 23, 2013, 12:57:38 PM

Comet Ison will reach perihelion on November 28th.  It will pass so close to the Sun it will actually pass through the corona.  If Ison survives, it could have a quite spectacular tail to see in December.

« Last Edit: November 23, 2013, 12:59:41 PM by Nevermore »

Over and out.
Hawkbit
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Reply #128 on: November 23, 2013, 05:55:23 PM

What's your image source?  They have an interesting amount of galaxies in that shot, but the star sparkles don't seem right.

I was just telling my wife about this comet; if all goes well we might have a 'comet of the century' event.  Pretty excited.
Nevermore
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Reply #129 on: November 23, 2013, 06:33:55 PM

Not sure what the original source is.  I found that one here.  There are a lot of photos from amateur astronomers.  Universe Today has a couple of nice ones, too.



Edit: Hawkbit, the BBC credited the photo you asked about to a Damian Peach, taken with a 15cm telescope on November 15th.  He has a website.
« Last Edit: November 28, 2013, 08:42:37 AM by Nevermore »

Over and out.
Hawkbit
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Reply #130 on: November 28, 2013, 09:51:50 AM

Nothing yet, but this page should update during the event.  http://cometison.gsfc.nasa.gov/#
Nevermore
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Reply #131 on: November 28, 2013, 03:24:32 PM


Over and out.
Teleku
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Reply #132 on: November 28, 2013, 03:27:53 PM

SpaceX has a rocket on the pad in cap Canaveral, which they are about to launch in about 15 minutes.  You can watch the live stream here if you want some rocket entertainment for your thanksgiving.

http://www.spacex.com/webcast/

"My great-grandfather did not travel across four thousand miles of the Atlantic Ocean to see this nation overrun by immigrants.  He did it because he killed a man back in Ireland. That's the rumor."
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Khaldun
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Reply #133 on: November 29, 2013, 02:18:47 PM

Space vampires appear to have repaired their spacecraft Comet Ison. http://io9.com/zombie-comet-ison-refuses-to-die-1473613064
jakonovski
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Reply #134 on: December 14, 2013, 06:15:15 AM

Chinese moon rockets, motherfuckers!
 


http://shanghaiist.com/2013/12/02/and_were_off_lunar_lander_on_its_wa.php

There was some fallout:


http://www.chinacartimes.com/2013/12/03/chinas-rocket-drops-roof/

But even so, some guys at NASA are literally turning green (and should perhaps consider funding the next launch by selling their salt mine):

Quote from: NASA
The arrival of the Chang'e 3 spacecraft into lunar orbit and then its descent to the surface will result in a significant contamination of the lunar exosphere by the propellant.


edit: the Jade Rabbit has landed!



http://www.bbc.co.uk/news/science-environment-25356603


« Last Edit: December 14, 2013, 07:37:44 AM by jakonovski »
Teleku
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Reply #135 on: December 14, 2013, 08:07:38 AM

Well luckily for them it went better than the other rocket they shot off recently that destroyed a $250 million Brazilian satellite:  why so serious?

http://www.space.com/23895-china-rocket-launch-failure-destroys-satellite.html

Neat the rover made it though, will be interesting to see how things progress.

"My great-grandfather did not travel across four thousand miles of the Atlantic Ocean to see this nation overrun by immigrants.  He did it because he killed a man back in Ireland. That's the rumor."
-Stephen Colbert
Krakrok
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Reply #136 on: December 14, 2013, 07:34:52 PM

01101010
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You call it an accident. I call it justice.


Reply #137 on: December 15, 2013, 05:49:09 AM

Hope they take pictures of the US flag.  why so serious?

Does any one know where the love of God goes...When the waves turn the minutes to hours? -G. Lightfoot
Fordel
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Reply #138 on: December 16, 2013, 05:31:12 PM

Are they actually near enough to do that? That would be pretty neat.

and the gate is like I TOO AM CAPABLE OF SPEECH
MahrinSkel
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Reply #139 on: December 16, 2013, 08:13:15 PM

Are they actually near enough to do that? That would be pretty neat.
Since the Tranquility Base flag is actually laying down, covered with moon dust, that picture might be a little more symbolic than you think.  But I don't think this rover is near there.

--Dave (it was too close to the lander, and got knocked over by the ascent stage according to Aldrin)

--Signature Unclear
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