Here is a list of all of the planets in our solar system.
Mercury: Mercury is the planet closest to the size of Earth's moon. This planet is the closest to the sun. Mercury has no rings or moon. There are no life forms on Mercury. Mercury has a thin atmosphere called a exosphere. The exosphere is made up carbon dioxide and nitrogen. Venus: This planet is close to the size of Earth. This is the closest planet to the sun. This is a rock planet, also known as a terrestrial planet. Venus has a cratered and volcanic landscape. Venus' thick and toxic atmosphere is made mostly of carbon dioxide and nitrogen. Venus has no moons or rings. There are no life forms on Venus. This planet spins backwards on its axis, also called retrograde.
Earth: The Earth is the only planet that has life forms on it. The Earth is the third planet from the sun. Earth is both a terrestrial and ocean planet. Our atmosphere is made up of nitrogen and oxygen and other stuff. The Earth has a moon, which is called a satellite. The Earth has no rings. The atmosphere protects us from incoming meteorites.
Mars: Mars is a cold desert world that has seasons, polar ice caps, volcanoes, canyons, and weather. The atmosphere, however, is to thin for liquid. There are signs of ancient floods, but they are now existing in icy soil and thin clouds. This terrestrial planet is the fourth planet from the sun. The planet has atmospheric effects such as dust storms. The atmosphere is made of carbon dioxide, nitrogen, and argon. This planet has two moons called Phobos and Deimos. Mars has no rings. Mars cannot support life , but a key science goal is to see if Mars' past and future have potential for life. A cool fact is that Mars is called the red planet because the iron minerals causes a rust, red atmosphere
Jupiter: Jupiter is the biggest planet. It is also a gas giant. Jupiter has the most moons of any planet in our solar system. Jupiter resembles a star in composition, but did not grow big enough to ignite. Jupiter's clouds are punctuated by massive storms, such as the great red spot. This planet is the fifth planet from the sun. Although this planet does not have a solid surface, it has an inner, solid core about the size of Earth. The atmosphere is made up of hydrogen and helium. Jupiter has fifty known moons with seventeen waiting confirmation. Jupiter also has a faint ring system found by the Voyager1. The moons of Jupiter have oceans.
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The difference between a planet and a dwarf planet is that planets have cleared the path and dwarf planets have not.This is why Pluto is no longer a planet.
Earth's Moon was formed when the dwarf planet Thea collided with Earth and the dust formed the moon.
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Saturn: Saturn has many ringlets and like other gas giants is a giant ball of hydrogen and helium. This planet is the sixth planet from the sun. Since it is a gas giant, Saturn has no solid surface. Saturn has 53 moons with 9 moons awaiting confirmation. Saturn is made up of 7 rings and with several gaps and divisions in between. Saturn cannot support life but the moon's conditions may.
Uranus: This planet has more methane in its atmosphere than H and He, which gives it its blue tint. Uranus is the seventh planet from the sun. Uranus is an ice giant, more than 80 percent of the planet's mass is hot dense fluid of icy materials such as water, methane, and ammonia. Uranus has 27 moons named after Pope and Shakespear. Uranus has a faint ring system, the inner are narrow and dark, while the outer are brightly colored. This planet cannot support life. Uranus spins east to west, also called retrograde.
Neptune: This gas giant is whipped by supersonic winds. This planet is the 8th planet from the sun. Neptune is a sister ice giant to Uranus. Neptune is mostly made of water, ammonia, and methane. Neptune has 13 moons with one waiting confirmation. Neptune has 6 rings and cannot support life.