Sunday, April 24, 2016

Our Galaxy and Other Galaxies

https://youtu.be/n_lvIbj7KPA

By Matt Reisner and Austin Huff

14 comments:

  1. Where is the black hole in our galaxy, and why does the black hole start out small?

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    1. Our galaxy's black hole corresponds to the location of Sagittarius A. A black hole's size depends on the size of the star that it starts from, and will grow with time.

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  2. What do scientists believe will happen to the galaxies when our galaxy collides with the Andromeda Galaxy? Or when galaxies collide in general?

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    1. When the Milky Way and Andromeda collide, both will become physically destroyed but they will form a new galaxy together.

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  3. When galaxies collide, what other than the shape can change?

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  4. How come Andromeda Galaxy might have as many as 26 black holes?

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    Replies
    1. Since Andromeda has a much larger bulge than the Milky Way's, then it is able to have more black holes. The bigger the galaxy the more black holes it will have.

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  5. How long ago did the Milky Way galaxy start to form?

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  6. To have as many as 26 black holes, how old would the Andromeda galaxy have to be?

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    Replies
    1. Andromeda is about 9 billion years old. It has so many black holes because it is a larger galaxy.

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  7. What do the arms consist of?

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    Replies
    1. Arms consist of a ton of stars that extend outward from the center of the galaxy.

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