Across
1
Particle of light
3
Blocking of light by a celestial body
5
Gas form of a liquid
6
Icy body with a tail near the sun
7
Hottest planet in solar system
11
Magnetic metallic element
Down
1
Positive particle in nucleus
2
Curved glass that refracts light
4
Form of thermal energy
8
Amplified beam of light
9
Molten rock beneath Earth surface
10
Measure of matter in an object