Across
1
Form of thermal energy
4
Our home planet
5
Blocking of light by a celestial body
6
Compound containing oxygen
Down
2
Curved glass that refracts light
3
Icy body with a tail near the sun
7
Unit of energy
8
Preserved remains of ancient life
Form of thermal energy
Our home planet
Blocking of light by a celestial body
Compound containing oxygen
Curved glass that refracts light
Icy body with a tail near the sun
Unit of energy
Preserved remains of ancient life