Across
1
Curved glass that refracts light
2
The Red Planet
5
Icy body with a tail near the sun
6
Blocking of light by a celestial body
9
Unit of force
10
Our home planet
Down
2
Natural satellite of Earth
3
Molten rock beneath Earth surface
4
Absolute temperature scale unit
7
Unit of power
8
Disturbance that transfers energy