Across
- 1. The hottest planet
- 5. 20 to several thousand galaxies
- 6. Equal length in day and night
- 9. Hottest layer in the Sun's atmosphere
- 10. Colourful lights caused by solar winds
Down
- 2. Celestial objects passing through a shadow or between a light source
- 3. Nuclear _______; how the Sun produces energy
- 4. Swirling cloud of gas and dust
- 7. Where a complete eclipse occurs
- 8. Causing the loss of bone and muscle mass
- 9. Leftover heat radiation from the Big Bang