Jagran Josh Logo
  1. Home
  2.  |  
  3. GK for Exams

List of amazing facts about the Solar System and its Planets

25-MAY-2017 18:18

    The celestial bodies revolves around the Sun, which includes 8 planets, 180 satellites, comets, meteors and asteroids, together constitute the Solar System.

    The Sun: Fact at a Glance

    The Sun is a star at the centre of the Solar System, which is a perfect sphere of hot plasma that generates a magnetic field through the dynamo process (a naturally occurring electric generator in the Sun's interior, produces electric currents and a magnetic field). The part of the sun that we can see is known as the photosphere. The outer most part of the sun, which visible only at the time of the eclipse is known as corona.

     Sun Anatomy

    Source: www.astronomyknowhow.com

    1. Minimum distance from the earth (Perihelion):147 million km (January 3)

    2. Maximum distance from the earth (Aphelion): 152.1 million km (July 4)

    3. Average distance from the earth: 149.8 million km

    4. Diameter: 13,92,000 km

    5. Volume: 1.3 million times that of the earth

    6. Mass: 3,32,000 times that of the earth.

    7. Gravity at the surface: 28 times that of the earth

    8. Density at the centre: 100 gm/cm3  

    9. Temperature of the photosphere: 6000°C

    10. Temperature at the centre: 15 million °C

    11. Temperature of the Sun-spots: 1500°C

    12. Energy dissipation: 1026 joules/second

    13. Pressure at the centre: 109 atm.

    14. Rotational time period: 25.38 days (relative to the equator); 33 days (relative to the poles).

    15. Composition: Hydrogen (71%), Helium (26.5%) and others (2.5%)

    16. Age: 5 billion years (approx)

    17. Estimated life of normal stars: 10 billion years (approx)

    18. Time taken by the light to reach the earth:  8 min 18 sec

    19. Velocity of the light — 3 x 108 m/s

    20. 1 light year (distance travelled by the light in one year):  9.45 x 10'3 km

    21. 1 parsec (largest/biggest unit of distance): 3.6 light years

    Our Changing view of the Universe

    The Earth: Fact a Glance

    The Earth is the third planet from the Sun and the fifth largest planets in the Solar System. It lies between the orbits of Venus and Mars. It rotates on its axis from west to east and is tilted on its axis by 23 ½ degree.

     The Earth

    1. Shape: Geoid

    2. Pole to pole diameter: 12,714 km

    3. Equatorial diameter: 12,756 km

    4. Polar perimeter: 40,008 km

    5. Equatorial perimeter: 40,075 km

    6. Mass: 5.97 x 1024 tonne

    7. Water: 71%

    8. Land: 29%

    9. Volume: 10.83 x 1011 km3

    10. Average Relative Density: 5.52 (with respect to the density of water)

    11. Age (estimated): 4.6 billion years

    12. Surface area: 511 million km2

    13. Rotational time: 23 hours 56 min 4 sec

    14. Revolution time: 365 days 5 hours 48 min 46 sec

    15. Revolution velocity: 29.8 km/sec

    16. Length of the orbit: 960 million km

    17. Minimum distance from the sun (Perihelion):147.9 million km

    18. Maximum distance from the sun (Aphelion): 152.1 million km

    19. Average distance from the sun: 149.8 million km

    20. Time taken by the light of the sun to reach earth: 8 min 18 see

    21. Distance from the moon: 384,000 km

    22. Deepest point: Mariana Trench (11,034 m deep from the mean sea level).

    Composition and Structure of the Earth

    The Moon: Fact at a Glance

    The Moon is a celestial body that revolve around the Earth and it is only natural satellite. It is the fifth largest natural satellite in the Solar System.

     Phases-of-the-moon

    Source: Wikimedia

    1. Average distance from the earth: 3, 84,365 km

    2. Maximum distance from the earth (Apogee): 4, 06,000 km

    3. Minimum distance from the earth (Perigee): 3,64,000 km

    4. Orbital time around the earth: 27 days 7 hours 43 min 11.47 sec

    5. Rotational time:  27 days 7 hours 43 min 11.47 sec

    6. Atmosphere:  Absent

    7. Diameter: 3,476 km

    8. Mass (compared to the earth):  1:81.30

    9. Density (relative to that of water):3.34

    10. Density (relative to that of the earth): 0.6058

    11. Hidden part of Moon's surface: 0.41 (41%)

    12. Highest point on the Moon: Mt Leibnitz (35,000 ft.) situated on the South Pole of the moon.

    Planets according to their size (Decreasing Order)

    1. Jupiter

    2. Saturn

    3. Uranus

    4.  Neptune

    5. Earth

    6. Venus

    7. Mars

    8. Mercury

    Planets according to their mass (Decreasing Order)

    1. Jupiter

    2. Saturn

    3. Uranus

    4. Mars

    5. Earth

    6. Venus

    7. Uranus

    8. Saturn

    Planets according to their density (Decreasing Order)

    1.  Earth

    2. Mercury

    3. Venus

    4. Mars

    5. Neptune

    6. Jupiter

    7. Uranus

    8. Saturn

    Planets according to their revolution period (Decreasing Order)

    1. Mercury

    2. Venus

    3. Earth

    4. Mars

    5. Jupiter

    6. Saturn

    7. Uranus

    8. Neptune

    Planets according to their revolution velocity (Decreasing Order)

    1. Mercury

    2. Venus

    3. Earth

    4. Mars

    5. Jupiter

    6. Saturn

    7. Uranus

    8. Neptune

    Terrestrial Planets

    Terrestrial Planets are those planets which are made up of rocks and their structures are being similar to that of the Earth.

    1. Mercury

    2. Venus

    3. Earth

    4. Mars

    Jovial Planets

    Jovial Planets are also called as ‘giant planets’ because their structures are similar to the Jupiter.

    1. Jupiter

    2. Saturn

    3. Uranus

    4. Neptune

    There are about 100 billion galaxies in the universe and the Milky Way Galaxy is one of it in which our Solar System exists. The Sun is the originator of the Solar System, which eventually is also a star, is the source of light and energy. Hence, in the list of amazing facts about the Solar System and its Planets gives a general awareness to the readers.

    Indian Geography: A Complete Study Material

    Latest Videos

    Register to get FREE updates

      All Fields Mandatory
    • (Ex:9123456789)
    • Please Select Your Interest
    • Please specify

    • By clicking on Submit button, you agree to our terms of use
      ajax-loader
    • A verifcation code has been sent to
      your mobile number

      Please enter the verification code below

    Newsletter Signup
    Follow us on