Across
- 5. Telescope that collects and magnifies radio waves.
- 6. Late stage in a star's life cycle that occurs when it's hydrogen fuel is depleted, it's core contracts, and it's outer layers expand and cool.
- 7. Giant star that lost its outer layers leaving behind a hot, dense core that continues to contract under gravity.
- 8. Optical instrument that use double convex lenses to collect light
- 9. Large group of stars, gas, and dust held together by gravity.
Down
- 1. light-emitting surface of the sun.
- 2. a spiral Galaxy that is about 100,000 light-years in diameter and contain from 200 to 400 billions star including the sun
- 3. Device that disperses light into its component wavelengths, using a prism or diffraction grating.
- 4. Star pattern that appears to form images,is used by astronomers to locate and name stars , and often is named for a mythological creature.
- 8. Optical instrument that uses a concave mirror to collect light and a lens to magnify an image.