Across
1
Unit of force
3
Solid with repeating atomic pattern
7
Path of a planet around the sun
8
Unit of energy
9
Naturally occurring inorganic solid
10
Compound containing oxygen
Down
2
Ball of burning gas in space
4
Precious yellow metallic element
5
Blocking of light by a celestial body
6
Natural satellite of Earth
11
Mass per unit volume
12
Absolute temperature scale unit