CFA #1

Which of these correctly compares the masses of different components in the universe?

What statement about the Sun is correct?

The Milky Way galaxy is described as a disk of stars orbiting a central point. Which of these best explains why people on earth cannot see the entire shape of the Milky Way galaxy?

Most stars fit into 1 of 4 groups on the HR Diagram. Which are of the diagram represents the Super Giants?

The spectral classes of 4 stars are shown below. A star that is several thousand times less bright than the sun with a temperature above 10,000K would be classified as--

Based on this diagram, the sun is location 1.

Based on this diagram, which type of stars would belong to spectral class K and have the highest luminosity?

With the use of the Hubble Space Telescope, scientists recently discovered a giant runaway star. It is ninety times larger than the Sun and much hotter. Why does the Sun appear to brighter than this runaway star when viewed from Earth?

Quasars are extremely distant celestial bodies. Investigators using a special telescope determined that a certain quasar was emitting waves with a frequency of 1.4X10^(17). The investigators were most likely using a telescope that detected--