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Neutron degeneracy pressure is what prevents neutron stars from collapsing into a black hole.

Who elects the President of the United States?

The spectrum of the cosmic microwave background corresponds to a temperature of about 3 degrees above absolute zero.

Which of the following is (are) found in the disk of the Milky Way Galaxy? There could be more than one correct answer.

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?

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

Suppose a planet is discovered orbiting a star in a highly elliptical orbit. While the planet is close to the star it moves , but while it is far away it moves .

All of the following are burn resuscitation measures except:

Earth’s rotation defines a , the cycle of the Moon’s phases takes about a , and Earth’s orbit defines a .