Across
- 2. the closest planet to the sun
- 4. The Big _____ Is the most knows constellation
- 6. Some galaxies are known as ______ galaxies and emit huge amounts of energy.
- 8. what remains when a supergiant star collapses into itself.
- 10. _________ galaxies form stars at a very fast rate.
Down
- 1. Massive stars become _____ ______
- 3. cools for eons until it is too cold to emit light.
- 5. A star begins as a ______, which is a cloud of gas and dust.
- 7. A star's _____ indicates its temperature.
- 9. The nearest star to Earth