Across
- 2. - A cloud of gas and dust in space
- 6. - Unit of distance equal to one million parsecs
- 7. - Unit of astronomical distance equal to 3.26 light-years
- 9. - Astronomer who proved galaxies exist beyond the Milky Way
- 11. - Outer atmosphere of the Sun or a black hole
- 12. - Rapid expansion of the very early universe
- 13. - Dark matter envelope surrounding a galaxy
Down
- 1. - The spread of light wavelengths from a source
- 3. - A neutron star with an extreme magnetic field
- 4. - ___ matter - invisible mass making up 27% of the universe
- 5. - Light stretched by the expansion of the universe
- 8. - Matter spiralling inward toward a black hole
- 10. - An active galaxy with a jet pointed directly at Earth