Across
1
Path of a planet around the sun
4
Compound containing oxygen
6
Blocking of light by a celestial body
7
Substance with pH below 7
12
Hottest planet in solar system
13
Curved glass that refracts light
Down
2
Precious yellow metallic element
3
Absolute temperature scale unit
5
Chemical element in table salt
8
Our home planet
9
Unit of heredity
10
Particle of light
11
Unit of electric potential
14
Tissue that contracts for movement