4-9-13 quiz

Vinnie Caringella

Astronomy

4-9-13

Quiz

1. A star's position along the main sequence is closely related to its mass.  We can estimate a star's mass just by knowing it's spectral type.

2. Giants and supergiants are stars that are nearing the ends of their lives. They are cooler but much more luminous than the Sun. They place in the upper right of the main sequence in an H-R diagram. White dwarfs stars are the cooling embers of stars that have exhausted their fuel for nuclear fusion.

3.There are modest-sized open clusters and densely packed globular clusters. The two types differ in how densely they're packed with stars, locations, and ages.

4. We can determine their ages by plotting their stars in an H-R diagram.The age of a star cluster approximately equals the hydrogen core-fusion lifetime of the most massive main-sequence stars remaining within it.

5. No we do not know any star clusters older than 14 billion years old.

6.A small mass star is going to have a longer life compared to a big mass star. More massive stars live much shorter lives because they fuse hydrogen at a much greater rate.

7. High mass stars are hotter than small mass stars.

8.Big mass stars are bluer than small mass stars.

9. The sun is closer.

10. 13.77 billion years old.