/u/Leftys-Wheelchair's posts in /r/askscience

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When I look up at the night sky, how far back in time and I truly looking?

14 upvotes

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So I just heard gravity is weaker than some other forces. What does that mean exactly?

4 upvotes

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If I were to go live on a planet that for every day there, it was a year here. How would my body age?

1 upvotes

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Is this quote true? "there are more stars in the sky than there are grains of sand on Earth. BUT, there are more atoms in a grain of sand than there are stars in the sky."

1 upvotes

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So the further we into space the further back in time we are looking. Because a black hole emits no light whatsoever. How are we looking at and saying it's back in time?

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Why exactly have we not discovered everything there is to discover in the depths of the ocean?

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Hawking was diagnosed with ALS at 21. He was given a 2 year life expectancy. 52 years later he's still alive. How?

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If I was to start reading a book as I try to get into the field of physics, astronomy, cosmology etc. What book should I buy?

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Is there a way of telling when a star becomes a supernova?

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So it's pretty well known at this point that cracking your knuckles does not cause arthritis. But is there any evidence on what cracking other joints/bones could cause?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
When I look up at the night sky, how far back in time and I truly looking?	14
So I just heard gravity is weaker than some other forces. What does that mean exactly?	4
If I were to go live on a planet that for every day there, it was a year here. How would my body age?	1
Is this quote true? "there are more stars in the sky than there are grains of sand on Earth. BUT, there are more atoms in a grain of sand than there are stars in the sky."	1
So the further we into space the further back in time we are looking. Because a black hole emits no light whatsoever. How are we looking at and saying it's back in time?	1
Why exactly have we not discovered everything there is to discover in the depths of the ocean?	1
Hawking was diagnosed with ALS at 21. He was given a 2 year life expectancy. 52 years later he's still alive. How?	1
If I was to start reading a book as I try to get into the field of physics, astronomy, cosmology etc. What book should I buy?	1
Is there a way of telling when a star becomes a supernova?	1
So it's pretty well known at this point that cracking your knuckles does not cause arthritis. But is there any evidence on what cracking other joints/bones could cause?	1