Planets in Solar System
v MERCURY
 |
| Mercury |
Distance from the Sun(million km): 57.9
Period of Revolution Round the Sun: 88 days
Period of Rotation on Own axis: 58
days 15 hr. and 30 minutes
No of Satellites: 0
Mass Time of Earth: 0.055
Nearest to the sun and smallest
and fattest planet. Also known “morning star” in the eastern sky and “evening
star” in the Western sky. Mercury and Venus lying between the sun and earth. it
have no moon. The smallest diameter of the planet is Mercury (4879km).
v VENUS
 |
| Venus |
Distance from the Sun (million km): 108.2
Period of Revolution Round the Sun: 224.7
days
Period of Rotation on Own axis: 243
days and 14 hours
No of Satellites: 0
Mass Time of Earth: 0.815
Brightest, hottest, closest to earth and earth nears twin planet. Also called evening and morning star. Venus lying between the sun and earth. Diameter of Venus is 12104. It contain largest quantity of carbon dioxide i.e. 95%. It has almost same mass, size and density as the earth. Venus reflects back to space the highest percentage of light it receives from the sun than any other planet of the solar system. The Venus is only planet whose day is longer than its year.
v EARTH
 |
| earth |
Period of Revolution Round the Sun: 365.25
days
Period of Rotation on Own axis: 23
h, 56 min and 40 seconds
No of Satellites: 1
Mass Time of Earth: 0.815
It is also called most dense planet, watery planet and bios planet. Earth is 109 times smallest in the Sun. It has one moon. On 24 April, 1990 the Hubble Space telescope was launched into the space. Diameter of earth is 12746km. The rank of earth in the solar system in terms of size is fifth.
v MARS
 |
| mars |
Period of Revolution Round the Sun: 687
days
Period of Rotation on Own axis: 24
h, 37 min and 22 seconds
No of Satellites: 2
Mass Time of Earth: 0.108
The diameter of mars in 6779 km. Mars takes very nearly the same time for a rotation on its own axis as does the earth. According to new scientific research water is present on the surface of Mars except earth planet, and found some proofs of presence of life in Mars.
v JUPITER
 |
| Jupiter |
Period of Revolution Round the Sun: 12
years
Period of Rotation on Own axis: 9
h, 50 min and 30 seconds
No of Satellites: 63
Mass Time of Earth: 317.9
Largest planet in the solar system and largest no of satellites. The diameter of Jupiter is 139,820 km. Jupiter planet with the shortest rotation time around its axis. “ Galileo Satellites” , named after their discoverer, are four large moons of the planet. The heaviest mass revolving round the sun is Jupiter. It contain the “Great Red Spot”.
 |
| Saturn |
Period of Revolution Round the Sun: 30
years
Period of Rotation on Own axis: 10
h and 14 minutes
No of Satellites: 56
Mass Time of Earth: 95.2
There are 56 Satellites ( Moons) of Saturn planet. The largest moon in the solar system, is also the largest moon of Saturn. Saturn planet is the least dense. The diameter of Saturn is 116460 km .
v URANUS
 |
| Uranus |
Period of Revolution
Round the Sun: 84 years
Period of Rotation on
Own axis: 16 h and 10
minutes
No of Satellites: 12
Mass Time of Earth: 14.6
The diameter of Uranus is 50,724km. The is only planet in the solar system which rotates on its axis from East to West. It is also known “Earth’s near twin planet".
v NEPTUNE
 |
| Neptune |
Period of Revolution
Round the Sun: 165 years
Period of Rotation on
Own axis: 18 h
No of Satellites: 8
Mass Time of Earth: 17.2
Coldest, slowest to move round
the sun. Diameter of Neptune is 49,244 km. The 8th no of planet in our solar system is Neptune.
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