/u/mpascall's posts in /r/askscience

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If light radiating from a star expands like a sphere in all directions, how is it that after many light years of expansion when that light finally reaches Earth such a small area of that sphere still seems to contain enough photons to blanket every square millimeter of our planet?

16 upvotes

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Does the viability of a sperm cell depend on its individual genetic payload? In other words, is the contest to reach and fertilize the egg a test of the kinds of genes it will contribute?

1 upvotes

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Could any of the galaxies we see some how be reflections of our own?

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Can we tell the difference between a universe which is expanding and a universe where matter is shrinking?

1 upvotes

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Instead of the universe expanding, could it be that everything in the universe is always shrinking?

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Is it possible that the universe isn't actually expanding, but it just look like it because everything in the universe is shrinking?

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What will lower my gas mileage more: rolling down the windows or running the AC?

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Is it possible that the universe isn't actually expanding, but it appears that way because everything in the universe is shrinking?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If light radiating from a star expands like a sphere in all directions, how is it that after many light years of expansion when that light finally reaches Earth such a small area of that sphere still seems to contain enough photons to blanket every square millimeter of our planet?	16
Does the viability of a sperm cell depend on its individual genetic payload? In other words, is the contest to reach and fertilize the egg a test of the kinds of genes it will contribute?	1
Could any of the galaxies we see some how be reflections of our own?	1
Can we tell the difference between a universe which is expanding and a universe where matter is shrinking?	1
Instead of the universe expanding, could it be that everything in the universe is always shrinking?	1
Is it possible that the universe isn't actually expanding, but it just look like it because everything in the universe is shrinking?	1
What will lower my gas mileage more: rolling down the windows or running the AC?	1
Is it possible that the universe isn't actually expanding, but it appears that way because everything in the universe is shrinking?	1