List of Planets

List of Planets of our Solar System

  1. Mercury
  2. Venus
  3. Earth
  4. Mars
  5. Jupiter
  6. Saturn
  7. Uranus
  8. Neptune


Mercury is the closest planet to our Star - The Sun. Mercury is the smallest planet in the Solar System. Mercury Orbits around the sun once every 88 days. It has no natural satellites. Telescopic observation of mercury was made by ace scientist, Galileo. He observed the planet with his telescope in the 17th century. Since mercury travels so close to the Sun, reaching it from Earth has technical challenges. Mariner - 10, Designed and developed by National Aeronautics and Space Administration (NASA) is the first space craft to visit Mercury.

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Venus is the second closest planet to our Star - The Sun. Venus orbits the sun every 224 days. It rotates around itself every 243 days. Venus has the longest rotation time among all the planets of the Solar System. Like Mercury, Venus has no natural Satellites. Venus is called Earth's Sister planet. It is called so because Earth and Venus have similar size, weight and closeness to the Sun. The Atmosphere of Venus is mostly comprised of Carbon Dioxide. Venus the hottest planet in the Solar System with average surface temperature of 460 degrees centigrade. Venus is one of the brightest object in the night sky, which became an inspiration for many cultures. It is described as Morning Star and Evening Star. Since Venus is the closest planet to Earth, it is technically easy to explore the planet. Venus is the first planet visited and landed by Spacecraft. Other than Carbox dioxide, the rest of the atmosphere is primarily Nitrogen. Venus has a high Volcanic activity, which resulted in large number of craters. The largest Crater in Venus is 280 kilometers. The Orbit of Venus around the sun is circular in nature. This differs from other planets, which orbit the sun in elliptical orbit. Venus also rotates the sun in clockwise direction. This differs from other planets, which rotate the sun in anti-clockwise orbit. The Venus symbol represents feminity.

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Earth is Third closest planet to the Sun after Mercury and Venus. It is the only known planet in the Cosmos to harbour life. Earth has only one natural satellite - The Moon. Earth revolves around the Sun every 365.26 days. Hence a year comprises of 365 days. And a leap year comprises of 366 days, to adjust the 0.26 days every 4 years. 71 percent of Earth's surface is covered by water. The remaining 29 percent is covered by land. Earth is spherical in structure. However due to rotation around the axis, the equator bulges out. Earth's atmosphere comprises of 78 percent Nitrogen and 21 percent Oxygen. It also contains water vapour, carbon dioxide and other gases. Earth's rotation time is 86400 seconds. This is equal to one day - 24 hours. The resources in planet Earth such as fossil fuels are useful to Humans. The gravity between Earth and it's natural satellite Moon is responsible for Tides on Earth. There are about 1400 artificial (man-made) satellites orbiting planet Earth.

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Mars is the fourth closest planet from our star - the Sun in our Solar System. It is the second smallest planet coming after Mercury. Mars goes around the Sun once every 687 days. Mars is knows as Red Planet. The planet gives the appearance of red, due to the presense of reddish iron oxide on the surface. Mars has two natural satellites. The name of the satellites of Mars are - Phobos and Deimos. They are small and irregularly shaped. Astronomers theorize that Phobos and Deimos may be captured Asteroids from space. Studying the land forms on Mars, astromers theorize that water had existed on mars. The largest crater on Mars is present in the Northern Hemisphere - The size of the crater is about 8500 kilometers. The largest mountain in Mars is Mount Olympus. It stands about 27 kilometers tall, about 3 times taller than Mount Everest. The atmosphere of Mars comprises primarily of Carbon Dioxide, Argon and Nitrogen. The seasons of Mars are similar to those of Earth. This is because the tilt of the two planets are similar.However, Seasons in Mars last twice that of Earth because Mars is far from the Sun. One day in Mars is similar to that of Earth - 24 Hours and 39 Minutes. The Mars symbol represents Masculinity.

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Jupiter is the Fifth closest planet to the Sun. It is the largest planet in the Solar System. Jupiter has 69 natural satellites. The largest natural satellite of Jupiter is Ganymede - which is larger than Mercury. Jupiter is a gaseous planet, meaning most of the planet is filled with gases, and not land mass. Jupiter is primarily made up of Hydrogen, and secondarily by Helium. 92 percent of Jupiter is Hydrogen, 8 percent of Jupiter is Helium. There are also trace amounts of other gases. Jupiter is also the heaviest of the planets in Solar System. If you combine all the planets of the Solar System, Jupiter would still be 2.5 times heavier. We can fit 1320 Earths in Jupiter. Jupiter is famously known for a giant storm - known as the Great Red Spot. The natural satellites discovered by Galileo are known as Galilean Moons. These moons are Io, Europa, Ganymede and Callisto. These moons are also among the largest satellites in the Solar System.

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Saturn is the Sixth closest planet to the Sun. It is the second largest planet in the Solar System. Saturn is famous for the ring, which comprises of particles caught in Saturn's massive gravitational pull. Saturn has 62 natural satellites. The largest natural satellite of Saturn is Titan. Titan is the second largest natural satellite in the World. Like Jupiter, Saturn is a gaseous planet. It is composed primarily of Hydrogen and Helium. An intersting feature of Saturn is that, it is less dense than water. So, Saturn can literally float on Water. Hydrogen in saturn is mostly present in liquid form, and in deep core it is in Solid form. Saturn comprises of 96 percent Hydrogen and 4 percentage Helium. There is a hexogonal vortex at the northern pole of Saturn.

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Saturn is the Seventh closest planet to the Sun. Uranus is an ice giant. The atmosphere of Uranus is composed of Hydrogen and Helium. Uranus is the coldest planet in our Solar System, with a temperature of -224 degrees centigrade. Uranus is dimly lit in the sky and has a slow orbit. So, early astronomers mistook Uranus for a comet or a star. Uranus finishes an orbit around the Sun once every 84 years. Uranus also rotates with a huge axial tilt of 98 degrees. So the climate of Uranus varies differently from other planets. One pole of Uranus faces the Sun constantly, while the other pole faces away from the Sun. So one pole gets constant sunlight for 42 years, while the other pole remains in night time for 42 years. Uranus has 27 moons. The largest natural satellite of Uranus is Titania. Uranus has rings just like Saturn. But they are not as large or prominently visible, because the ring comprises of extremely dark particles.

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Neptune is the eight closest planet to the Sun. Like Uranus, Neptune is an ice giant. The atmosphere of Neptune is composed of Hydrogen and Helium. Nepture revolves around the sun once every 165 years. Neptune has 13 natural satellites. The largest natural satellite of Nepture is Triton. The interior of Neptune comprises of ice and rock. Neptune has a Great Dark Spot similar to the Great Red Spot of Jupiter. The Great Dark spot is present in Neptune's Southern Hemisphere. Neptune is the outermost planet of the Solar System. Neptune also has a planetary ring system, but it is substantially smaller compared to Saturn. The rings comprise primarily of ice particles. The only spacecraft to have approached Neptune is Voyager 2.

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