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Science - Astronomy XI

Across
A planet that has a deep massive atmosphere that is made up mostly of gas (hydrogen and helium) and ice. Jupiter, Saturn, Uranus and neptune
One of the highly dense planets nearest to the sun. There are 4. ROCKY PLANET (LIKE EARTH)
Current model of the solar system in which the sun is the center of the - Earth and other planets orbit the sun
Often referred to as "dirty balls". Made up of gas, dust and ice and move around the sun in an oval-shaped orbit. Comets are sometimes visible to the naked eye when they pass through an inner solar system because of their long tail. Comets come from the Kuiper Belt and Out Cloud.
Down
Average distance between Earth and the sun - 150,000
A bright streak of light that results when a meteoroid burns up in Earth's atmosphere due to friction.
Describes something that used Earth as the reference point
Millions of small rocky object that orbits the sun inside the asteroid belt between the orbits of mars and jupiter. They range in size from <1meter to several hundred km. They are the largest objects in the solar system besides planets and moons.