Exam 18: The Universe

If the magnitude difference between one star and another is 1,the stars differ in brightness by a factor of

The Sun will finally become a

Our home galaxy is called _______________.

What color are the stars with the hottest photosphere?

Celestial longitude is called

The brightest planet has an apparent magnitude of about - 4 and is named

The three fusion reactions in the Sun that form helium from hydrogen are together called the

What is the temperature in kelvins of the visible surface of the Sun?

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

Which of the following represents the longest distance?

Familiar groups of stars that are parts of a constellation or parts of different constellations are called

The Sun has an apparent magnitude of about

The lifetime of a star is determined by its initial ______________.

The remaining core of a planetary nebula is called a(n)______________.

The three fusion reactions used by the Sun to generate energy are together known as the ______________.

The two types of bright nebulae are emission nebulae and _______________ nebulae.

An incredibly dense star so massive that light cannot escape from its surface is called a _______________.

White dwarfs are relatively

The "surface" of a black hole is known as the ______________.

A star of magnitude 0 is how many times brighter than a star of magnitude 6?