Planets Fact: All About the Planets
Abstract: A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion and has cleared its neighboring region of planet pessimal.
Mercury :
Mercury is the smallest and innermost planet in the Solar System. Its orbital period around the Sun of 87.97 days is the shortest of all the planets in the Solar System. It is named after the Roman deity Mercury, the messenger of the gods.
Venus :
Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. It has the longest rotation period of any planet in the Solar System and rotates in the opposite direction to most other planets. It does not have any natural satellites. It is named after the Roman goddess of love and beauty.
Earth :
Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite.
Mars :
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.
Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a giant planet with a mass one-thousandth that of the Sun, but two-and-a-half times that of all the other planets in the Solar System combined.
Saturn :
What are planets
Our solar system has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. With the exception of Uranus and Neptune, each of these planets can be seen unaided. All eight planets can be see through the use of an inexpensive amateur telescope or binoculars.
Mercury :
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| Copyrights: Google Image |
Orbital period: 88 days
Distance from Sun: 57.91 million km
Length of day: 58d 15h 30m
Mass: 3.285 × 10^23 kg (0.055 M⊕)
Radius: 2,439.7 km
Venus :
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| Copyrights: Google Image |
Orbital period: 225 days
Length of day: 116d 18h 0m
Distance from Sun: 108.2 million km
Radius: 6,051.8 km
Equatorial rotation velocity: 6.52 km/h (1.81 m/s)
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| Copyrights: Google Image |
Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite.
Distance from Sun: 149.6 million km
Radius: 6,371 km
Mass: 5.972 × 10^24 kg
Age: 4.543 billion years
Mars :
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| Copyrights: Google Image |
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.
Gravity: 3.711 m/s²
Orbital period: 687 days
Mass: 6.39 × 10^23 kg (0.107 M⊕)
Surface pressure: 0.636 (0.4–0.87) kPa; 0.00628 atm
Jupiter :
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| Copyrights: Google Image |
Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a giant planet with a mass one-thousandth that of the Sun, but two-and-a-half times that of all the other planets in the Solar System combined.
Mass: 1.898 × 10^27 kg (317.8 M⊕)
Orbital period: 12 years
Radius: 69,911 km
Surface area: 61.42 billion km²
Distance from Sun: 778.5 million km
Saturn :
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| Copyrights: Google Image |
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius about nine times that of Earth. It has only one-eighth the average density of Earth, but with its larger volume Saturn is over 95 times more massive.
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 have bulk chemical compositions which differ from that of the larger gas giants Jupiter and Saturn.
Neptune :
Neptune is the eighth and farthest known planet from the Sun in the Solar System. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. Neptune is 17 times the mass of Earth, slightly more massive than its near-twin Uranus.
Orbital period: 29 years
Distance from Sun: 1.434 billion km
Mass: 5.683 × 10^26 kg (95.16 M⊕)
Radius: 58,232 km
Surface area: 42.7 billion km²
Uranus :
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| Copyrights: Google Image |
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 have bulk chemical compositions which differ from that of the larger gas giants Jupiter and Saturn.
Distance from Sun: 2.871 billion km
Orbital period: 84 years
Mass: 8.681 × 10^25 kg (14.54 M⊕)
Radius: 25,362 km
Neptune :
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| Copyrights: Google Image |
Neptune is the eighth and farthest known planet from the Sun in the Solar System. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. Neptune is 17 times the mass of Earth, slightly more massive than its near-twin Uranus.
Orbital period: 165 years
Distance from Sun: 4.495 billion km
Radius: 24,622 km
Surface area: 7.618 billion km²
