A loose collection of ice, dust and small rocky particles, typically with a long, narrow orbit of the sun

the fuzzy outer layer of a comet

the solid inner core of a comet

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

the region of the solar system between the orbit of Mars and Jupiter, where many asteroids are found

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 other than that on Earth

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