Across
- 2. caused by the moon's gravitational pull on the oceans
- 5. planets in other planetary systems
- 7. a natural satellite,
- 8. a telescope and the last name of an astronomer
- 9. one of the brightest things in space
Down
- 1. a measurement of distance in reference to light
- 3. caused by the earth's tilt
- 4. earth's evil twin
- 6. a cloud of gas and dust in space