Across
1
Positive particle in nucleus
4
Hottest planet in solar system
6
Icy body with a tail near the sun
7
Blocking of light by a celestial body
9
Reddish electrical conductor
Down
2
Center of an atom or cell
3
Magnetic metallic element
5
Ball of burning gas in space
8
Amplified beam of light
10
Path of a planet around the sun