All Questions
Tagged with fundamental-astronomy universe
5
questions
3
votes
3
answers
215
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Account for radiation energy in the statement "total energy of universe is zero"
I've read in Hawking's book The Theory of Everything that total energy of the Universe is zero. He explained this by saying that if there are two bodies separated by a distance and having some mass, ...
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2
votes
2
answers
105
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What happens if one day aliens want to talk to us. How can we talk to them? [closed]
Always I wonder about that if some day alien wants to talk to us, then how can we talk to them? They didn't know any of the language on the Earth.
What will be the basic building blocks for it?
- 21
0
votes
1
answer
296
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Why do we we even exist? [closed]
It came to my mind one day that why does this universe even exist and why do we even exist and like we are enclosed in the so called atmosphere and a floating rock in space called the Earth, so is ...
- 111
2
votes
1
answer
775
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If the universe is 'flat', what shape is it? [duplicate]
As in the title, If the universe is considered to be 'flat', what shape is it?
Is it a disc, elliptical, square, rectangle?
Or is this still unknown as we can only study a small segment of the ...
- 557
4
votes
2
answers
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How and when did we learn about the universe?
I'm 13 - I'd like to know how we found/discovered important details about the Universe. I know we have found many different things about the Universe, but when did we find how amazingly large the ...
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