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Science Vocabulary #9

An object in space that orbits or circles around a bigger object. There are two kinds: natural (such as the moon orbiting the Earth) or artificial (such as the International Space Station orbiting the Earth).
This occurs when the Moon passes between the Sun and Earth, and when the Moon fully or partially blocks the Sun.
Earth’s average distance from the sun, which is approximately 150 million kilometers. (93 million miles)
The sun and all objects that revolve around it, including the planets and their moons, asteroids, comet, and their meteors.
A region of lighter shadow that may surround an umbra.
The four largest moons of Jupiter—Io, Europa, Ganymede, and Callisto. They were first seen by Galileo Galilei They are the first objects found to orbit another planet. Their names derive from the lovers of Zeus.
All living organisms on Earth in the air, on the land, and in the waters; one of the four parts of the Earth system.
This occurs when the Moon passes directly behind the Earth into its umbra.
A brief streak of light produced by a small particle entering Earth’s atmosphere at a high speed.
A small, solid, rocky body that orbits the sun; most orbit in a region between Mars and Jupiter called the asteroid belt.