Across
1
Glass that splits light into spectrum
3
Reddish electrical conductor
4
Compound containing oxygen
5
Blocking of light by a celestial body
6
Absolute temperature scale unit
8
Unit of power
10
Preserved remains of ancient life
Down
1
Particle of light
2
Mass per unit volume
3
Icy body with a tail near the sun
7
Ball of burning gas in space
9
The Red Planet
11
Infectious microscopic agent