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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 region of very tightly packed gas in the sun's interior where energy is transferred mainly in the form of light
a huge reddish loop of gas that protrudes from the sun's surface linking parts of sunspot regions
an eruption of gas from the sun's surface that occurs when the loops in sunspot regions suddenly connect
the name often given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune
a loose collection of ice, dust, and small rocky particles, typically with a long, narrow orbit
a doughnut shaped region that stretches from around Pluto's orbit to about 100 times Earth's distance from the sun
rocky object revolving around the sun that are too small and numerous to be considered planets
the region of the solar system between the orbits of Mars and Jupiter where many asteroids are found
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