Across
1
Our home planet
4
Preserved remains of ancient life
5
Naturally occurring inorganic solid
9
Ball of burning gas in space
10
Blocking of light by a celestial body
11
Second lightest element
Down
2
Amplified beam of light
3
Unit of force
6
Precious yellow metallic element
7
Disturbance that transfers energy
8
Substance with pH above 7