Stars

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Across
  1. 4. A gravitational dense region of space-time where nothing can escape, not even light
  2. 5. The tightly-packed collapsed core of a larger star
  3. 7. A cool, small star on the main sequence
Down
  1. 1. A star plotted in the left-to-right band across the HR diagram
  2. 2. A large, hot star off the main sequence
  3. 3. A stellar core remnant of a low to medium mass star
  4. 6. An older star with a cooler outer layer