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Galaxies Glossary

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

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