In our Galaxy, young metal-rich stars are found

A geologically dead moon would show

Edwin Hubble discovered Hubble’s Law when he plotted the          of galaxies.

What would you expect the overall color of a globular cluster to be?

Most astronomers now agree that dark matter probably does not really exist, and rather indicates a fundamental problem in our understanding of gravity.

What is the celestial sphere?

Which of the following planets is just past Saturn?

If the strength of gravity is greater than the upward pressure provided by neutron degeneracy pressure, a black hole can be formed from a neutron star.

If there is no dark matter in the Milky Way Galaxy, what is the best alternative explanation for the observations?

The most common organism of bacterial pneumonia is?