This document defines key vocabulary terms related to the universe and astronomy, including definitions for astronomy, stars, planets, moons, comets, asteroids, meteors, galaxies, planetary systems, and other celestial objects and phenomena. Terms are defined briefly, with an illustration or two words added for some entries. The document serves as a reference for basic terms used in studying and describing astronomical bodies and concepts.

1. VOCABULARY
THE UNIVERSE

2. THE UNIVERSE VOCABULARY
ASTRONOMY
The science that studies
the Universe.

3. THE UNIVERSE VOCABULARY
SUN PLANETS
STAR
PLANET RINGS MOON

4. THE UNIVERSE VOCABULARY
ASTRONAUT ROCKET
SPACESHIP
U.F.O. (Unidentified Flying Object) ALIENS

5. THE UNIVERSE VOCABULARY
DUST FIRE
ICE
IRON COLD
HOT

6. THE UNIVERSE VOCABULARY
CLOSE
FAR

7. THE UNIVERSE VOCABULARY
TELESCOPE
To move in a
path around
a star.
ORBIT
A tool that
makes distant
objects
appear larger,
brighter and
sharper.

8. THE UNIVERSE VOCABULARY
A small
rounded body
in orbit
around a
planet.
An object in
orbit around
a planet to
send us
information
about it.
ARTIFICIAL
SATELLITE
MOON
(NATURAL SATELLITE)
A large body
in orbit
around a star.
PLANET

9. THE UNIVERSE VOCABULARY
A rock that
spins around
the Sun.
A small rock
(shooting
star) that
reaches the
Earth´s
surface.
ASTEROID METEORITE
SHOOTING STAR
A piece of rock
(broken asteroid)
burning up on
entering the
Earth´s
atmosphere.

10. THE UNIVERSE VOCABULARY
A big mass of
ice, dust and
gases that
spins around
the Sun.
A group of
stars that
form
drawings.
A gas cloud.
COMET NEBULA
CONSTELLATION

11. THE UNIVERSE VOCABULARY
PLANETARY SYSTEM
A collection of
systems, gas,
clouds and
dust bound
together by
gravity.
GALAXY
A collection
of planets,
moons and
other objects
that orbit
around a star.