Previously answered questions by Ann Martin

(in order of times viewed)

1. Can we make a movie of the Milky Way galaxy's rotation?
2. During close approaches, can Mars appear in our sky as large as the Moon?
3. Could the Universe's dark matter be made up of black holes?
4. Why don't skydivers burn up like meteors?
5. How do supernovae show us that the Universe's expansion is accelerating?

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