How can being a citizen scientist help our local ecosystems?
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Ответ:
Ответ:
Yes.
Explanation:
3C273 is a quasar that is 93 million miles away, and we can see it. On a clear night sky with no lights around, you can see approximately 2 million light years into the Andromeda galaxy. That's more than 1/2 of the Earth's age.