Across
1
Positive particle in nucleus
4
Unit of electric potential
5
Solid with repeating atomic pattern
6
The Red Planet
9
Icy body with a tail near the sun
Down
2
Blocking of light by a celestial body
3
Tectonic landmass section
4
Hottest planet in solar system
7
Path of a planet around the sun
8
Mass per unit volume
10
Center of an atom or cell