Which celestial body is know for its intense pull of gravity?

• nebula
• black hole
• Super Giant
• A Galaxy

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

• Earth is a part of this galaxy
• Many more stars exist outside the galaxy
• The stars in the center of the galaxy are extremely small.
• The center of the galaxy consists of a dense cluster of stars.

Based on this diagram which type of stars would belong to spectral class M and have the lowest luminosity?

• Main Sequence Stars
• Giants
• Super Giants
• White Dwarfs

Use the Hertzsprung Russell Diagram to answer the following question.  How do the characteristics of Vega and Barnard's Star compare?

• Vega is cooler and less bright than Barnard's Star.
• Vega is hotter and brighter than Barnard's Star.
• Vega is cooler and brighter than Barnard's Star.
• Vega is hotter and less bright than Barnard's Star.

Use the Hertzsprung Russell Diagram to answer the following questions.  A star that is several thousand time brighter than the sun with a temperature lower than 5,000^oC and is red.

• Betelgeuse
• Deneb
• Sirius B
• Barnard's Star

Use the Hertzsprung Russell Diagram to answer the following questions. A star that is several thousand time brighter than the sun with a temperature higher than 6,000^oC and is white.

• Betelgeuse

• Deneb

• Sirius B

• Barnard's Star

The universe has may different components.  Which list places four components of the universe in the most likely order from smallest to largest.

• Planets, Stars, Galaxies, Nebulae
• Nebulae, Stars, Planets, Galaxies
• Galaxies, Stars, Planets, Nebulae
• Planets, Stars, Nebulae, Galaxies

Zeta Eridani has a temperature of 40,000 what is its spectral class?

• Spectral Class O
  
• Spectral Class A
• Spectral Class G
• Spectral Class M

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

• Earth is a part of this galaxy
• Many more stars exist outside the galaxy
• The stars in the center of the galaxy are extremely small.
• The center of the galaxy consists of a dense cluster of stars.

The Hertzsprung-Russell diagram is provided, which is used for classifying stars based on the relationship between their brightness and their temperature and color. Regulus belongs in which of the following classifications?

• Super Giants
• Giants
• Main Sequence Stars
• White Dwarfs