Exam 24: Beyond Our Solar System

Stars having the same surface temperature radiate the same amount of energy per unit area.

Which one of the objects listed below has the largest size?

Stars with a surface temperature 3000 K appear red in color.

The red shift refers to the tendency of stars to cool and become red in color.

The larger the magnitude number,the brighter will be the star.

The "true" brightness of a star is called its ________ magnitude.

The Sun is considered an average star.

Slipher made the observation that galaxies rotated and moved relative to each other.Hubble expanded on this work to show that ________.

magnitude color temperature composition

There are three possible fates for the universe: 1)eternal expansion; 2)total collapse; or 3)some equilibrium condition with no further motion.What conditions might favor one result over the other?

Stars that are composed of matter in which electrons have combined with protons are called ________ stars.

Red Giant neutron star main sequence Red Supergiants

Our galaxy is called the Milky Way.

Prior to the formation of the protostar,________.

The Sun belongs to this class of stars.

Fluorescence occurs when ________.

Degenerate matter can have densities 1 million times greater than the density of water,and they achieve this density by ________.

A neutron star theoretically will form from a supernovae collapse that ________.

Cepheid Variables are stars whose brightness varies in a predictable manner so that the absolute magnitude of the star can be determined,and this allows the ________ of the star to be determined.

The largest known galaxies are ________.