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

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In order to communicate with a small, distant object (say, for Earth to focus on Voyager or vice-versa), how precisely must angle be controlled? In other words -- is it important to be extremely precise in where we are pointing, or are we just blasting in the general direction?

16 upvotes

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What's the difference between alpha beta and gamma rays, and are there any other Greek-letter rays, and what is a mnemonic so I don't keep forgetting the difference?

14 upvotes

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Is it possible for an earth-based telescope to capture images of stars (not the sun!) during normal daytime conditions?

13 upvotes

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Does chemotherapy eradicate a cancer, or just delay its relapse?

13 upvotes

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Have lunar explorers slept while on the moon? How well did they sleep?

11 upvotes

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In a photo of Andromeda galaxy (example in text), are any of the discrete-looking stars in Andromeda, or are they in the milky way?

10 upvotes

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Having learned that cancer is just cells with bad genetic mutations ... in an adult body, what portion of the "normal" cells is genetically identical to the genes endowed at birth? How commonplace and how persistent is mutation? Are we filled with innocuous mutants?

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What's the significance of oxidation number in a covalent bond? Are the electrons shared, or aren't they? (rephrased my awkward question from yesterday)

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Seems like we often cure diseases in mice as a stepping stone to curing them in people. So, are these therapies made available to veterinarians, so that actual mice (pet mice) can see some benefit from these breakthroughs?

9 upvotes

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Did Copernicus, who proposed a heliocentric model, know about Occam's Razor and did he make reference to it?

9 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
In order to communicate with a small, distant object (say, for Earth to focus on Voyager or vice-versa), how precisely must angle be controlled? In other words -- is it important to be extremely precise in where we are pointing, or are we just blasting in the general direction?	16
What's the difference between alpha beta and gamma rays, and are there any other Greek-letter rays, and what is a mnemonic so I don't keep forgetting the difference?	14
Is it possible for an earth-based telescope to capture images of stars (not the sun!) during normal daytime conditions?	13
Does chemotherapy eradicate a cancer, or just delay its relapse?	13
Have lunar explorers slept while on the moon? How well did they sleep?	11
In a photo of Andromeda galaxy (example in text), are any of the discrete-looking stars in Andromeda, or are they in the milky way?	10
Having learned that cancer is just cells with bad genetic mutations ... in an adult body, what portion of the "normal" cells is genetically identical to the genes endowed at birth? How commonplace and how persistent is mutation? Are we filled with innocuous mutants?	10
What's the significance of oxidation number in a covalent bond? Are the electrons shared, or aren't they? (rephrased my awkward question from yesterday)	10
Seems like we often cure diseases in mice as a stepping stone to curing them in people. So, are these therapies made available to veterinarians, so that actual mice (pet mice) can see some benefit from these breakthroughs?	9
Did Copernicus, who proposed a heliocentric model, know about Occam's Razor and did he make reference to it?	9