Across
1
Ball of burning gas in space
3
Glass that splits light into spectrum
4
Naturally occurring inorganic solid
6
Basic unit of life
8
Particle of light
9
Center of an atom or cell
Down
2
Preserved remains of ancient life
3
Positive particle in nucleus
5
Amplified beam of light
7
Blocking of light by a celestial body
8
Tectonic landmass section