Beyond our Solar System Test 2025

When the core of a star collapses forever, the extremely dense object that remains is called a(n) black dwarf.

• True

• False

A yellow star will be at a hotter temperature than a red star.

• True

• False

Stars are assigned a spectral type, with M (red stars) being the hottest stars.

• True

• False

Astronomers can sometimes identify binary stars even if only one star is visible.

• True

• False

Absolute magnitude takes distance into account when indicating the surface temperature of a star.

• True

• False

The Hertzsprung-Russell diagram (H-R) diagram, first plotted in the nineteenth century, demonstrates the relationship of luminosity and mass.

• True

• False

In the modern classification of apparent magnitude, a negative number has a greater brightness than a positive number.

• True

• False

At its nucleus, the Milky Way galaxy is about 100,000 lightyears wide and about

• 10,000 light-years thick.

• 1,000,000 light-years thick.

• 1,000 light-years thick.

• 100,000 light-years thick.

Which of the following is NOT a factor that affects the apparent brightness of a star as seen from Earth?

• how big the star is

• how hot the star is

• how old the star is

• how far away the star is

According to the big bang theory, the entire universe began as a

• supernova explosion.

• scattered band of space dust.

• cool, dark expansive nebula.

• dense, hot, supermassive ball.