Across
1
Our home planet
4
Blocking of light by a celestial body
5
Force that attracts objects together
10
Natural satellite of Earth
Down
2
Solid with repeating atomic pattern
3
Ball of burning gas in space
6
Center of an atom or cell
7
Naturally occurring inorganic solid
8
Basic unit of life
9
Hottest planet in solar system
11
Tissue that contracts for movement