Across
1
Blocking of light by a celestial body
6
Natural satellite of Earth
7
Form of thermal energy
9
Curved glass that refracts light
10
Precious yellow metallic element
11
The Red Planet
Down
2
Ball of burning gas in space
3
Nerve cell in the brain
4
Substance with pH below 7
5
Tectonic landmass section
8
Chemical element in table salt