Star

Why does the Earth receive more energy from the sun than it's next closest star, Proxima Centauri?

• the sun is larger

• the sun is hotter

• the sun is closer

• the sun is more dense

Why does the sun appear brighter than the supergiant star Betelgeuse?

• the sun is a different color

• the sun is older

• the sun is closer

• the sun is made of different elements

The stable period of a star’s life cycle is called...

• The birth of a star

• Nebula

• Neutron star

• Main Sequence

Hotter stars appear to be what color?

• Red

• Blue

• Yellow

• Green

Which of the following best describes a nebula. A nebula is

• a region in the solar system that is occupied by irregularly shaped bodies

• a large and icy celestial body with an irregular orbit around the Sun

• a natural satellite created by the collision of two large asteroids

• an interstellar cloud of dust, hydrogen, helium and other gases

Use the Hertzsprung Russell Diagram to answer the following question. Which of these observations of Procyon is most likely accurate?

• Procyon is less bright than the Sun, has a surface temperature below 5,000 ^oC, and is red orange.

• Procyon is brighter than the Sun, has a surface temperature below 5,000 ^oC, and is red orange.

• Procyon is brighter than the Sun, has a surface temperature of about 6,000 ^oC, and is yellow.

• Procyon is less bright than the Sun, has a surface temperature of about 6,000 ^oC, and is yellow

Use the Hertzsprung Russell Diagram to answer the following question. Which of these observations of Tau Ceti is most likely accurate?

• Tau Ceti is less bright than the Sun, has a surface temperature above 5,000 ^oC, and is red orange.

• Tau Ceti is brighter than the Sun, has a surface temperature below 5,000 ^oC, and is red orange.

• Tau Ceti is brighter than the Sun, has a surface temperature below 5,000 ^oC, and is yellow.

• Tau Ceti is less bright than the Sun, has a surface temperature above 5,000 ^oC, and is yellow

Based on this diagram which type of stars would belong to spectral class G and have the highest 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 Rigel compare?

• Vega is cooler and less bright than Rigel.

• Vega is hotter and brighter than Rigel.

• Vega is cooler and brighter than Rigel.

• Vega is hotter and less bright than Rigel.

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