This is very big, you can find all the planets here U _ _ _ _ _ _ _
UNIVERSE
LIGHT-YEAR
The sun is an example of this S _ _ _
STAR
This is not a human but a being from another planet
ALIEN
PERSON
HUMAN
This is a person who travels into space
ASTRONAUT
The distance light travels in one year
LIGHT-YEAR
LIGHT-DAY
You see this is the sky at night M _ _ _
SUN
MOON
This is our star that we see in the day. It is very bright. S _ _
SUN
MOON
Science that studies the Universe
CHEMISTRY
BIOLOGY
ASTRONOMY
