A

asteroids

small, irregular shaped space bodies - many of them orbit the sun between Mars and Jupiter

attraction

the force of pulling one object towards another

B

black holes

a collection of matter that is so dense that even light does not escape

C

catalogue

a list of data or information of a given topic

comets

frozen balls of gas that orbit the sun

G

galaxios

Greek word meaning milky circle

galaxy

a huge collection of space matter gathered together by gravity - includes stars, planets, moons, asteroids comets and other matter

Galileo

Italian mathematician and scientist who lived between 1564 and 1642

gas clouds

clouds made of gas and/or dust

gravity

the force of attraction between any two masses

H

Herschel

German astronomer who lived between 1738 - 1833

Hubble

American astronomer who lived between 1889 and 1953

M

Magellan

Portuguese sailor who lived between 1480 and 1521 - the first to sail completely around the world

moons

smaller spherical bodies that orbit planets

S

sombrero

a type of wide brimmed hat which originated in Mexico

stars

burning sphere of gas - a sun

U

universe

all of space and its contents