Exam 18: The Universe

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

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

The letters LMC refer to the galaxy named _______________.

The angular measure in degrees north or south of the celestial equator is called ______________.

The fundamental components in the structure of the universe are the ______________.

Sirius is a binary star, consisting of Sirius A and Sirius B. Sirius B is a

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

By definition, the universe consists of

A star of magnitude 1 appears _______________ times brighter than a star of magnitude 2.

The color of a star reveals its

The Big Dipper is a(n)

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

A(n) ______________ is equivalent to 3.26 light-years.

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

The heliosphere is defined as the volume of space over which the ______________ extends.

Which of the following is part of the Sun's structure?

The cluster of galaxies that includes our Milky Way is called the _______________.

The pseudoscience called ______________ contends that the planets' positions in the sky at the time of a person's birth affect the individual's personality or future.

What is the visible surface of the Sun called?

The imaginary, huge, apparently moving sphere on which the stars appear to be mounted is called the ______________ sphere.