Astronomy Quiz 3

21-centimeter radiation provides astronomers with information on interstellar molecular hydrogen gas.

• true

• false

The apparent magnitude is

• how bright a star looks from 1 light-year

• how bright a star looks to us

• how bright a star looks from Mars

• how bright a star is compared to the sun

Sunspots are dark because magnetic fields hold down the heat at those spots

• true

• false

We can tell that light has passed through a dust cloud because the light appears redder

• true

• false

Atomic hydrogen can be detected because the electrons switch their spin

• true

• false

On the H-R diagram, White Dwarves appear in the lower left

• in the lower left

• in the lower right

• in the upper left

• in the upper right

The curved line where most stars spend their time on the H-R diagram is called the Main Sequence

• the Main Sequence

• Stellar Parallax

• the Luminosity Path

• the event horizon

On the H-R diagram, Red Giants appear in the upper right

• in the lower left

• in the lower right

• in the upper left

• in the upper right

Nothing can travel faster than the speed of light.

• True

• False

The part of the Sun we see all the time is called the corona.

• True

• False