Stars

123456
Across
  1. 2. Like Nebula but turns into something else
  2. 4. When the stars loose energy and shrink
  3. 6. The stage where the sun goes boom boom
Down
  1. 1. Final stage of a low mass star, Dark
  2. 2. Means earliest in Greek
  3. 3. First stage in a star's life, still a cloud
  4. 5. Our sun is one