The Solar System By: Eli Champion

The Sun The sun is a star that Earth and 7 other planets orbit. The diameter is a total of 1,391,000 kilometers long. The sun has NO moons. The total amount of gravity on the sun is 617.5 km/s. That’s enough to crush you on the ground if you were not burned to death by the heat.

Inner and Outer Planets The inner planets are Mercury, Venus, Earth, and Mars. They are rocky and dense. They have no rings. They have few moons. The outer planets are Jupiter, Saturn, Uranus, and Neptune. These planets are made of many gases. They are huge compared to the inner planets. They have many moons and rings.

Mercury Mercury is the closest planet to the Sun. This planet is a inner planet. The distance from the sun is 35,980,000 miles. It takes 176 Earth days to make full rotation around the Sun. It takes 89 Earth days to make a full revolution around the Sun. The density is 4,879 km. The gravity on Mercury is %38 the gravity on Earth. The temperature is 750 degrees Fahrenheit. It has no moons or rings.

Venus Venus is the 2nd closest planet to the Sun and is a inner planet. Venus is 67,240,000 miles from the sun. It takes 243 Earth days to make a rotation and 225 Earth days to make a orbit around the Sun. The diameter of Venus is 7,521 miles. The temperature on Venus is the hottest of the planets in are solar system. The gravity on Venus is about %90 the gravity on Earth. It has no moons.

Earth Earth is the 3rd planet from the sun and is a inner planet. Earth is about 92,960,000 miles from the Sun. It takes 365 days to orbit the Sun and takes 1 day to make a rotation. The diameter of Earth is 7,918 miles. The average temperature on Earth is 15°C. Earth has 1 moon that we call moon.

Mars Mars is the 4th planet from the Sun and is a inner planet. The total distance from the sun is 141,600,000 miles. The time of a full rotation is exactly 24 hours, 37 minutes and 22 seconds. The time to make a orbit around the Sun is 687 days. The diameter of Mars is 4,212 miles long. The temperature on Mars is very cold. The gravity on Mars is %38 the gravity on Earth. Mars has no moons.

Jupiter Jupiter is the 5th planet from the Sun and is a outer planet. The distance of Jupiter from the Sun is about 778 million km. The time in one full rotation of Jupiter is 9.9 hours. The time to make a revolution is 11.86 years. The diameter of Jupiter is 86,881 miles. The temperature is thought to be 145 degrees C. The gravity on Jupiter is 2.53 the gravity on Earth. Jupiter has 69 moons.

Saturn Saturn is the 6th planet from the Sun and is a outer planet. The distance of Saturn from the Sun is 890,700,000 miles. The time it takes for Saturn to make a rotation is about 10 hours and 39 minutes. The time to make a revolution is about 30 days. The diameter of Saturn is 72,367 miles. The temperature of Saturn is about 288 degrees Fahrenheit. The gravity on Saturn is %91 the gravity on Earth. Saturn has 62 moons discovered so far.

Uranus Uranus is the 7th planet from the Sun and is a outer planet. The distance from the Sun to Uranus is 1.79 billion miles. Uranus makes a full rotation in 17 hours 14 minutes 24 seconds. It takes 84 years to make a full revolution around the Sun. The diameter of Uranus is 31,518 miles. The gravity on Uranus is %89 the gravity on Earth. The temperature on Uranus is the coldest in the solar system and has 27 known moons.

Neptune Neptune is the 8th planet from the sun and it is an outer planet. Neptune orbits the Sun at a distance of 30.1 AU. Temperatures at the planet's center are approximately 5,400 K (5,000 °C). Neptune revolves around the sun once every 165 years. Neptune makes a full rotation in 16 hours. The diameter of Neptune is 30,599 miles. The temperature on Neptune is -218 degrees Celsius. Neptune’s gravity is %14 stronger than Earth’s. Neptune has 13 moons. Neptune has the most violent weather in our Solar System. It has a giant storm on it.

Asteroids Asteroids are minor planets, especially those of the inner Solar System. The larger ones have also been called planetoids. These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disk of a planet and was not observed to have the characteristics of an active comet, but as minor planets in the outer Solar System were discovered, their volatile-based surfaces were found to more closely resemble comets and so were often distinguished from traditional asteroids.

Comets A comet is an icy small Solar System body that, when passing close to the Sun, heats up and begins to outgas, displaying a visible atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of solar radiation and the solar wind upon the nucleus of the comet.