Definitions
An extremely large group of stars, gas, and dust
Galaxy
Large, round objects in space that orbit around a star
Planets
An object made of rock, ice, dust, and gas that revolves around the sun
Comets
A phase of the moon when half of the moon is visible on the left side
Last Quarter
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Ball of burning gas at the center of our Solar System
Sun
A rocky or metallic object that orbits the Sun and is much smaller than a planet
Asteroids
A phase of the moon when half of the moon is visible on the right side.
Firt Quarter
A phase of the moon when only the dark side is visible from Earth
New Moon
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Natural objects that orbit a planet
Moons
The pattern of how the moon looks each night as it orbits the Earth.
Moon phases
A system containing a star and the bodies held in its gravitational field, including planets and their moons
Solar System
A phase of the moon when we can see the entire lit side of the moon from Earth
Full Moon
Why is the sun important to Earth?
Heat from the sun makes Earth warm enough to live on
The movement of an orbiting planet completely around Sun
Revolution
Large bills of burning gas in space
Stars
The four planets farthest away from the Sun, made of gas, with thick atmospheres, cold temperatures, many moons, rings, and longer years
Outer planets
What do planets orbit?
The spiral galaxy of which our Sun and the Earth is part
Milky Way
The four planets closest to the Sun, that have solid composition, thin atmospheres, warmer temperatures, few/no moons, and shorter years
Inner Planets
The spinning motion around an imaginary axis of celestial body such as a planet
Rotation
What do moons orbit?
Planets