The Solar System
The Solar System consists of the Sun, the nine planets and their satellites; the comets, asteroids, meteoroids, and interplanetary dust and gas. It is composed of two systems, the inner solar system and the outer solar system. The inner solar system contains the Sun, Mercury, Venus, Earth and Mars. The outer solar system contains Jupiter, Saturn, Uranus, Neptune and Pluto. The inner planets are relatively small and made primarily of rock and iron. The asteroids orbit the sun in a belt beyond the orbit of Mars, tumbling and sometimes colliding with one another. Made mostly of rock and iron, the asteroids may be the remnants of a planet that never formed. The outer planets, with the exception of Pluto, are much larger and made mainly of hydrogen, helium, and ice. Many astronomers believe that Pluto was and interstellar wanderer that was captured by the Sun's gravity and was not an original part of the solar system. The orbits of the planets are ellipses with the sun at one focus, though all except mercury and Pluto are very nearly circular. The orbits of the planets are all more or less in the same plane that is called the ecliptic. The ecliptic is inclined only seven degrees from the plane of the ecliptic with and in
The Sun is by far the largest object in our solar system. One AU is about 93 million miles or 150 million kilometers. Numbering in thousands, asteroids range in size from Ceres, to microscopic grains. The atmosphere of Jupiter is composed mainly of hydrogen, helium, methane, and ammonia. The surface of the Earth is made up of 71% water. The Sun is, at present, about 75% hydrogen and 25% helium by mass; everything else amounts to only 0. Through a telescope, Uranus appears as a greenish disk, slightly elliptical because of its rapid rotation. Jupiter is the first of the "Gas Giants", and the fifth planet from the Sun. Unlike the other planets, Earth's crust is divided into several separate solid plates, which float around independently on top of the hot mantle below. Located in the Southern Hemisphere the storm rotates counterclockwise and has been observed ever since 1664. Venus lies between the orbit of the Sun and Earth, so Venus passes through phases like the moon, varying from a large bright crescent (when it is close) to a silvery disk (when it is far away). The pressure is 250 billion and the temperature is 15. Its mean density can compare to the earth.
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Acceptance Essays
