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Joined: Wed January 02, 2013 12:35 am Posts: 35492
E.H. Ruddock wrote:
During one of my all too frequent ponderings about the universe, i wondered if we’ve ever discovered two similar planets. Not even one similar to earth, just two planets with same atmosphere, surface makeup, etc. ?
Well loads I’d imagine. Gas planets are all over the place and we’ve a limited periodic table of (known) elements n all that
How they can tell what gases they are from millions of light years away is what I can never understand.
Joined: Sat January 05, 2013 1:57 pm Posts: 32522 Location: Where everybody knows your name
dimejinky99 wrote:
E.H. Ruddock wrote:
During one of my all too frequent ponderings about the universe, i wondered if we’ve ever discovered two similar planets. Not even one similar to earth, just two planets with same atmosphere, surface makeup, etc. ?
Well loads I’d imagine. Gas planets are all over the place and we’ve a limited periodic table of (known) elements n all that
How they can tell what gases they are from millions of light years away is what I can never understand.
Smell
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Joined: Tue January 01, 2013 7:41 am Posts: 19724 Location: Cumberland, RI
dimejinky99 wrote:
I mean look. How do they know??
This page gives an overview. Basically, they’re reading the light of the planet’s star as it passes through the atmosphere, using that to figure out the chemical composition.
Joined: Wed January 02, 2013 12:35 am Posts: 35492
Simple Torture wrote:
dimejinky99 wrote:
I mean look. How do they know??
This page gives an overview. Basically, they’re reading the light of the planet’s star as it passes through the atmosphere, using that to figure out the chemical composition.
Joined: Tue January 01, 2013 7:41 am Posts: 19724 Location: Cumberland, RI
dimejinky99 wrote:
Simple Torture wrote:
dimejinky99 wrote:
I mean look. How do they know??
This page gives an overview. Basically, they’re reading the light of the planet’s star as it passes through the atmosphere, using that to figure out the chemical composition.
Joined: Sat January 05, 2013 1:57 pm Posts: 32522 Location: Where everybody knows your name
Simple Torture wrote:
dimejinky99 wrote:
Simple Torture wrote:
dimejinky99 wrote:
I mean look. How do they know??
This page gives an overview. Basically, they’re reading the light of the planet’s star as it passes through the atmosphere, using that to figure out the chemical composition.
Joined: Tue January 01, 2013 9:55 pm Posts: 13819 Location: An office full of assholes
This is unbelievable.
“The matter being pulled in toward this black hole, in the form of a disc, emits so much energy that J0529-4351 is over 500 trillion times more luminous than the Sun [1]. “All this light comes from a hot accretion disc that measures seven light-years in diameter — this must be the largest accretion disc in the Universe," says ANU PhD student and co-author Samuel Lai. Seven light-years is about 15 000 times the distance from the Sun to the orbit of Neptune.”
Joined: Sun September 15, 2013 5:50 am Posts: 22416
some cool things in this thread
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Joined: Wed January 02, 2013 12:35 am Posts: 35492
Will remind you all again there’s an absolutely incredible documentary about Voyager called ‘the farthest’. It’ll blow your mind. Do look it up. Inspirational stuff.
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