Across
1
Hottest planet in solar system
3
Naturally occurring inorganic solid
6
Second lightest element
7
Magnetic metallic element
9
Smallest unit of an element
10
Ball of burning gas in space
Down
2
Positive particle in nucleus
4
Amplified beam of light
5
Absolute temperature scale unit
8
Blocking of light by a celestial body
11
Fourth state of matter