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18 Cards in this Set

  • Front
  • Back
ASTEROID
A ROCKY OBJECT, MUCH SMALLER THAN A PLANET, ORBITING THE SUN
ATMOSPHERE
A LAYER OF GASES SURROUNDING A PLANET
AXIS
AN IMAGINARY LINE AROUND WHICH A PLANET SPINS
COMET
A BALL OF ICE AND DUST THAT ORBITS THE SUN
GRAVITY
AN INVISIBLE PULLING FORCE THAT HOLDS EVERYTHING ON EARTH...

KEEPS THE MOON CIRCLING THE EARTH AND HOLDS EARTH AND THE PLANETS IN ORBITS AROUND THE SUN
METEORITE
A SPACE ROCK THAT HAS CRASHED INTO THE SURFACE OF A PLANET OR MOON
MOON
SMALL PLANET-LIKE BODY THAT CIRCLES A PLANET
ORBIT
THE PATH AN OBJECT TAKES THROUGH SPACE
PLANET
A LARGE OBJECT THAT ORBITS A STAR AND DOES NOT MAKE ITS OWN LIGHT
ROTATION
THE SPINNING OF A PLANET ON ITS AXIS
SOLAR SYSTEM
THE SUN AND ITS PLANETS, MOONS AND SMALLER ORBITING BODIES
TELESCOPE
AN INSTRUMENT THAT MAKES VERY FARAWAY OBJECTS SEEM NEARER...THEY ARE USED TO LOOK AT PLANETS AND MOONS
SPACE PROBE
A ROBOT-LIKE SPACESHIP WITH NO HUMAN CREW
LUNAR
ANYTHING TO DO WITH THE MOON
REVOLUTION
THE COMPLETION OF AN ORBIT AROUND THE SUN
ELLIPTICAL
THE SHAPE OF THE EARTH'S ORBIT AROUND THE SUN...NOT QUITE A CIRCLE
STAR
HUGE, FIERY BALLS OF BURNING GAS
CONSTELLATION
A GROUP OF STARS THAT FORM A PATTERN IN THE NIGHT SKY