our solar system consists of eight planets, which are separated into the inner planets that room closer come the sun and the external planets that much, much farther away. In stimulate of street from the sun, the inside planets space Mercury, Venus, Earth and also Mars. The Asteroid Belt (where thousands of asteroids orbit the sun) lies between Mars and Jupiter, make the external planets, Jupiter, Saturn, Uranus and also Neptune, also farther away from the sun, with bigger orbits than the inside planets.

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According come the Beacon learning Center, because the 4 inner planets room solid, composed of rock and also metals, they are likewise called “rocky” or “terrestrial” planets. Much away not just in distance yet in kind of matter, the four outer planets are comprised of gases and also are usually denser toward the center. These outer planets are called “gas giants” and also are periodically referred to as “Jovian,” which means “like Jupiter,” the biggest planet in our solar system.

The 4 terrestrial planets contain similar rocks and metals. Your cores differ rather in state (molten, partly molten or solid), but iron is a significant component in all four. This planets are tiny relative to the gas giants, their carefully packed aspects making for rocky planets with high densities. Together rocky planets, their surfaces room solid.


All the terrestrial planets have landforms suggesting past or existing volcanic activity. Top top Earth, the course, volcanic activity continues. Additionally, all 4 rocky planets present evidence of affect in the kind of craters, back on Earth, water and also winds have actually eroded lot of the evidence, except in locations of minimal or no rainfall.


In comparison to the rocky planets, the larger, external planets are mostly composed the gases, and also have deep atmospheres. Because of the thickness of the rocky planets, their diameters space all much less than 8,000 miles, as contrasted to the smallest of the gas giants, Neptune, which is 30,000 miles in diameter, according to NASA. Unequal the rocky planets, the gas giants are not comparable in dimension to one another.

The rocky planets revolve on their axes slowly contrasted to the gas giants. The inside planets all take a 24-hour day or much longer to fully rotate on your axes. Earth takes the least time at one day, and also Venus take away the longest -- eight month -- to make one full rotation. In contrast, the speedy gas giants all complete their “daily” rotations in under 17 planet hours, follow to The nine Planets.org.

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None of the within planets have rings, while all of the external planets have quite a few (rings are consisted of of small particles, maybe ice, that circle the external planets). Within planets have a paucity that moons, through Mars claiming two and also Earth simply one. Mercury and also Venus have none. Each of the outer planets, on the various other hand, has multiple satellites.

Donna Fuller began in youth publishing in the 1980s, and an ext recently worked as a inquiry for proposal (RFP) writer in finance. In 2005 she published the children's non-fiction book, "How economics Works: The share Market." She earn a Bachelor of art in English literary works from Fordham University.