4-10-13

Vinnie Caringella

Astronomy

4-10-13

Quiz 19

1. A star is born when gravity causes a cloud of interstellar gas to contract to the point at which the central object becomes hot enough to sustain nuclear fusion in its core.

2. 300M Sun to 0.08M Sun.

3. Stars go through a main-sequence stage, a red giant stage, and then goes through it's last gasps.

4. The low-mass star will eject its outer layers into space, creating a huge shell of gas expanding away from the inert carbon core.

5. Yes

6.Yes

7. A planetary nebular is an emission nebula consisting of an expanding glowing shell of ionized gas ejected during the asymptotic giant branch phase of certain types of stars late in their lives.

8. Yes

9. Sun to 0.08M Sun.

10. Conservation of angular momentum ensures that protostars rotate rapidly.