Across
1
Path of a planet around the sun
4
Tissue that contracts for movement
5
Chemical element in table salt
6
Gas form of a liquid
9
Precious yellow metallic element
10
Icy body with a tail near the sun
11
Blocking of light by a celestial body
Down
2
Preserved remains of ancient life
3
Compound containing oxygen
4
Molten rock beneath Earth surface
7
The Red Planet
8
Unit of energy