Exam 18: The Universe

The Greek astronomer who assigned the stars to six magnitudes was named _______________.

Six trillion miles is equivalent in distance to one ______________.

The next phase in the life cycle of the Sun will be

For low-mass stars, the life cycle phase that just precedes white dwarf formation is

What astronomer established the present system for classifying galaxies?

In a halo around the Milky Way's nuclear bulge lie about 200

The Sun projects charged particles into space, giving rise to a flow of radiation called the

Gas and dust distributed among the stars is known as the _______________.

In the middle of the Crab Nebula (M1) is

Brown dwarfs are often described as

What elementary particle has no charge, travels at or near the speed of light, and hardly ever interacts with other particles?

Our solar system lies about how many light-years from the center of the nuclear bulge of the Milky Way?

What is the name given to all matter, energy, and space?

Clusters containing clusters of galaxies are called _______________.

Celestial longitude is called

The closest star to the Sun is about how far away?

The creation of elements inside a star is called _______________.

What type of galaxy is the Milky Way?

What color are the stars with the hottest photosphere?

The apparent path that the Sun traces annually along the celestial sphere is known as the ______________.