galaxy rotation articles
Why do galaxy rotation curves remain flat?
What type of galaxy contains mostly old stars?
How did Edwin Hubble measure the distance of the Andromeda Galaxy?
What type of galaxy has old red stars?
Why is the sky dark at night with all these stars and galaxies?
Is our galaxy spiral elliptical or irregular?
What did Edwin Hubble notice about the movement of galaxies?
What is the force that clumps galaxies together?
What causes the waves to glow in a spiral galaxy?
What keeps the stars in a galaxy together?
Where are the oldest stars in the galaxy mostly found?
Are all stars contained in galaxies?
Which type of galaxy is likely to form the fewest stars?
Where is the most active region of star formation in our galaxy?
Why is it helpful to look at very distant galaxies to study galaxy formation and evolution over cosmic time?
How did Hubble calculate the distances to far away galaxies based on?
How did Edwin Hubble prove that Andromeda is not a nebula in our galaxy?
How did Hubble measure the distance to the Andromeda Galaxy?
Why can it be difficult for astronomers to make observations of distant galaxies?
How have astronomers determined that the Sun rotates on its axis?
How do astronomers know the Sun rotates?
Do spiral galaxies have star formation?
What is found in a spiral galaxy?
What did Hubble find out about the most distant galaxies?
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