| They asserted that it drew close enough to disrupt the orbits of rocky objects, sending a shower of bolides toward the inner planets. |
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| A planetary transit is like an eclipse of the Sun, with the inner planets Mercury or Venus becoming the obscuring objects, instead of the Moon. |
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| Mars is the only one of the inner planets that can be made habitable simply by changing its climate. |
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| The inner planets all formed from the disk of gas and dust, the solar nebula, that surrounded our young sun. |
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| Of the four inner planets, also known as terrestrial or rocky planets, Mercury is the smallest, oldest, and densest. |
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| The eighth planet from the sun, its gaseous structure contrasts with the rocky inner planets. |
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| It is also known that the inner planets are dense and rocky, whereas the outer planets are composed largely of frozen gases. |
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| Evidence of the collisions is preserved in the craters which cover the inner planets. |
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| It is believed that eventually the sun will expand into a red giant, swallowing all of the inner planets, and destroying all life on earth. |
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| This explains the composition of much of the asteroid belt as well as the inner planets. |
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| The relatively small inner planets have solid surfaces, lack ring systems, and have few or no moons. |
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| Among the inner planets, only Earth has a strong magnetic field, which shields it from the interplanetary medium. |
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| As I headed away from the three-story-tall cross-section sculpture of the Sun, the inner planets came swiftly. |
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| Such asteroids would rapidly have adopted orbits that cut across those of the inner planets, including Earth. |
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| These are separated into four inner planets and five outer planets. |
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| The inner planets are rocky, the outer ones are gaseous and have rings. |
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| One area of the so-called inner planets have certain characteristics. |
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| Within a decade, colonies had been established on all the inner planets, and before the century was out, the entire system was colonized in some form or another. |
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| The four inner planets, including Earth, are rocky, and the four outer planets are gas giants. |
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| While Titan resembles the rocky inner planets, Saturn is mostly atmosphere. |
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| Pluto is a small lump of rock and ice, more like the rocky, inner planets. |
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| Scientists think that during this time the inner planets, including Earth, were hit with a barrage of asteroids, probably the remnants of the solar system's formation. |
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| The Solar System is subdivided into the inner planets, the asteroid belt, and the outer planets. |
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| Asteroids, now known as small solar system bodies, are the bits and pieces left over after the formation of the inner planets, including the Earth. |
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| Asteroids, now known as Small Solar System Bodies are the bits and pieces left over after the formation of the inner planets, including the Earth. |
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