galaxies – Page 4 – National Radio Astronomy Observatory

How Much Dark Matter Does the Milky Way Contain?

You can read about how the Milky Way galaxy’s rotation curve is measured and how this rotation curve indicates…

For most galaxies the mass density that we can measure due to its brightness decreases as one moves from…

On large scales, beyond the distances over which galaxies can interact via their mutual gravitational force, galaxies all tend…

The reason that Dark Matter plays a larger role in the motions of objects within galaxies while Dark Energy…

The Andromeda Galaxy contains roughly one trillion stars, while the Milky Way Galaxy is estimated to contain roughly 250…

I believe that the object to the lower-right in your image of the Andromeda Galaxy (M31) is one of…

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