Nebula

1
Nebula

• Sara ?
• Katie?

2

• A nebula is an interstellar cloud of dust,
  hydrogen gas, and plasma.
• It is the first stage of a stars cycle.
• May be described as discrete objects with
  identifiable boundaries.

3

• Most nebula are described as diffuse nebula, or
  having no well defined boundaries.
• Planetary nebula nebulae that form from the
  gaseous shells that are ejected from low-mass
  asymptotic giant branch stars when they transform
  into white dwarfs.

4

• A supernova occurs when a high mass star reaches
  the end of its life.
• Some nebulae are formed as the result of
  supernova explosions, the death throes of
  massive, short-lived stars.

5

• Other nebulae may form as planetentry nebulae.
  This is the final stage of a low-mass star's
  life, like Earth's Sun. Stars with a mass up to
  8-10 solar masses evolve into red giants and
  slowly lose their outer layers during pulsations
  in their atmospheres.

6
(No Transcript)
7
(No Transcript)