Across
1
Nerve cell in the brain
3
Blocking of light by a celestial body
5
Magnetic metallic element
7
Chemical element in table salt
9
Solid with repeating atomic pattern
10
Icy body with a tail near the sun
11
Glass that splits light into spectrum
13
Absolute temperature scale unit
Down
2
Push or pull on an object
3
Our home planet
4
Curved glass that refracts light
6
Gas essential for breathing
8
Force that attracts objects together
12
Path of a planet around the sun