a model of the universe in which Earth is at the center of the revolving planets and stars

a model of the solar system in which Earth and the other planets revolve around the sun

a loose collection of ice, dust and small rocky particles

a doughnut shaped region that stretches from around Pluto’s orbit to about 100 times Earth’s distance from the sun.

a spherical region of comets that surrounds the solar system

rocky objects revolving around the sun that are too small and numerous to be considered planets

a chunk of rock or dust in space

a streak of light in the sky produced by the burning of a meteoroid in Earth’s atmosphere

a meteoroid that passes through the atmosphere and hits Earth’s surface

life that exists on other planets

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