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Author Question: Why does the rotation of our galaxy suggest that it is more massive than previously thought? What ... (Read 79 times)

PhilipSeeMore

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on: Jul 27, 2018
Why does the rotation of our galaxy suggest that it is more massive than previously thought?
 
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Question 2

A(n) ___________________ _ is a cool, dense cloud of dust and gas that is undergoing gravitational contraction.
 
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diesoon

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Reply #1 on: Jul 27, 2018
Answer to Question 1

The best observations of the rotation curve of the Milky Way show that orbital velocities in the outer disk are constant or even increasing with distance from the center of the galaxy. Those high orbital velocities indicate that the larger orbits enclose more mass and imply that our galaxy has much more mass than is contained within the radius of the Sun's orbit.

Answer to Question 2

protostar


PhilipSeeMore

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


diesoon

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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