Exam 18: The Universe

The Sun's high-speed charged nuclei and electrons form a fourth phase of matter known as a

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

The Andromeda Galaxy (M31)is what type?

What is the value for the total energy that reaches each square meter of Earth from the Sun each second called?

The temperature of the Sun's interior is estimated to be about how many kelvins?

Taurus the Bull is a(n)

The greater the mass of a star,the _______________ it moves through its life cycle.

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

The creation of elements inside a star is called _______________.

Six trillion miles is equivalent in distance to one ______________.

The visible surface of the Sun has a temperature of about ______________ K.

The apparent motion of an object when it is viewed from two different positions against a fixed background is called

When the absolute magnitudes,or brightnesses,of stars are plotted against their surface temperatures or colors,we obtain a(n)

Taking the reciprocal of a star's parallax angle in arcsec gives the star's

The ______________ is the remnant of a supernova explosion observed in A.D.1054.

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

The half-circle that defines the starting point for designating longitude on the celestial sphere is called the

What astronomer established the present system for classifying galaxies?

An incredibly dense star so massive that light cannot escape from its surface is called a(n)______________.

Enormous filaments of excited gas arching over the Sun's surface and extending hundreds of thousand of kilometers outward are called