SOLAR SYSTEM

       The Solar System comprises the sun and the objects that orbit it, whether they orbit it directly or by orbiting other objects that orbit it directly.Of those objects that orbit the Sun directly, the largest eight are the planets that form the planetary system around it, while the remainder are significantly smaller objects, such as comets and asteroids.        The Solar System also contains...

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MERCURY

       Mercury is the smallest and closest to the Sun of the eight planets in the Solar System, with an orbital period of about 88 Earth days. Seen from Earth, it appears to move around its orbit in about 116 days, which is much faster than any other planet. It has no known natural satellites.      Mercury is one of four terrestrial planets in the Solar System, and is a rocky body like Earth. It is the smallest...

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VENUS

       Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. It has no natural satellite. After the Moon, it is the brightest natural object in the night sky. Because Venus is an inferior planet from Earth, it never appears to venture far from the Sun: its elongation reaches a maximum of 47.8°.        Venus is a terrestrial planet and is sometimes called Earth's "sister planet" because...

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EARTH

       Earth, also known as the world, Terra, or Gaia, is the third planet from the Sun, the densest planet in the Solar System, the largest of the Solar System's four terrestrial planets, and the only celestial body known to accommodate life. It is home to about 8.74 million species. Its equatorial radius is of 6378.1 km. There are billions of humans who depend upon its biosphere and minerals.The moon is its unique natural...

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MARS

       Mars is the fourth planet from the Sun and the second smallest planet in the Solar System, after Mercury. It is often described as the "Red Planet" because the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the volcanoes, valleys, deserts, and polar ice caps of Earth. The...

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JUPITER

       Jupiter is the fifth planet from the Sun and the largest planet in the Solar System. It is a gas giant with mass one-thousandth of that of the Sun but is two and a half times the mass of all the other planets in the Solar System combined. Jupiter is classified as a gas giant along with Saturn, Uranus and Neptune. Together, these four planets are sometimes referred to as the Jovian or outer planets. The planet was known...

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SATURN

       Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter.        Saturn is a gas giant with an average radius about nine times that of Earth. While only one-eighth the average density of Earth, with its larger volume Saturn is just over 95 times more massive.        Saturn's interior is probably composed of a core of iron, nickel and...

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URANUS

       Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both are of different chemical composition to the larger gas giants Jupiter and Saturn. It has a equatorial radius is equivalent 4.007 Earths. Thus, astronomers sometimes place them in a separate category called "ice giants". Uranus's...

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NEPTUNE

       Neptune is the eighth and farthest planet from the Sun in the Solar System. It is the fourth-largest planet by diameter and the third-largest by mass. Among the gaseous planets in the Solar System, Neptune is the densest. Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times the mass of Earth but not as dense. Neptune orbits the Sun at an average distance of 30.1...

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