1.
a system of stars (e.g. the "Milky way")
2.
our sun and the eight planets - ______ system
4.
someone who works in space
5.
a man-made object floating in space
6.
the force that pulls objects towards the ground
7.
a creature from another planet
8.
you pay this person money when you buy things at the supermarket
9.
to stay healthy, you should eat fruit and ________
10.
there are over 100 billion ______ in our galaxy
11.
someone who studies animals
12.
someone who studies the earth
13.
something new that someone makes (e.g. t.v, light bulb, computer)
14.
something that people buy and sell
