Across
1
Blocking of light by a celestial body
5
Gas form of a liquid
7
Nerve cell in the brain
8
The Red Planet
9
Hottest planet in solar system
Down
2
Solid with repeating atomic pattern
3
Gas essential for breathing
4
Path of a planet around the sun
6
Unit of energy
10
Disturbance that transfers energy
11
Infectious microscopic agent