Solar System Questions

Solar System Questions and Answers for all classes and competitive exams.

Mercury

Nearest to the sun, fastest and smallest planet of our universe solar system.

Distance from the Sun (Million Km)57.9
Period of Revolution Around the Sun88 Days
Period of Rotation on Own Axis57.9
Mass time of Earth0.055
No. of Satellites0
Surface Area (Million km²)74.8
Radius2,439.7 km

Venus

Hottest, Brightest and closet to the Earth planet. Average surface temperature of Venus is around 450° C.

Venus is also known as Earth twin planet of Universe. Venus spins clockwise on its axis.

One day on Venus is longer than one year, Venus has a slow axis rotation on own axis which takes 243 Earth days to complete its day.

Distance from the Sun (Million Km)108.2
Period of Revolution Around the Sun224.7 days
Period of Rotation on Own Axis243 days & 14-H
Mass time of Earth0.815
No. of Satellites0
Surface Area (Million km²)460.2
Radius (km)6,051.8 km

Earth

Most Dense , Watery and Bios Planet of the universe. The earth has an ellipsoid shape.

Distance from the Sun (Million Km)149.6
Period of Revolution Around the Sun365.25 days
Period of Rotation on Own Axis23 H, 56 mint, 40 Sec
No. of Satellites1
Surface Area (Million km²)510.1 million km²
Radius6 378.1 kilometers

Mars

Second smallest planet of our solar system being larger than only Mercury. Fourth from the Sun, referred as red planet of our solar system.

Distance from the Sun (Million Km)227.9
Period of Revolution Around the Sun687 days
Period of Rotation on Own Axis24 H, 37 mint, 22 Sec
Mass time of Earth0.108
No. of Satellites2
Surface Area (Million km²)144.8 million km²
Radius (km)3,389.5 km

Jupiter

Largest planet of our solar system with largest number of satellites. Fastest Spinning Planet (Smallest day) in solar system.

Distance from the Sun (Million Km)778.3
Period of Revolution Around the Sun12 Years
Period of Rotation on Own Axis9 H, 50 mint, 30 Sec
Mass time of Earth317.9
No. of Satellites53*
Surface Area (Million km²)61.42 billion km²
Radius (km)69,911 km

Note*: A Dozen New Moons Of Jupiter Discovered, scientists now think Jupiter has 79 moons.

Saturn

Least dense planet in solar system.

Distance from the Sun (Million Km)1427
Period of Revolution Around the Sun30 Years
Period of Rotation on Own Axis10 H and 14 mint
Mass time of Earth95.2
No. of Satellites82 moons
Surface Area (Million km²)42.7 billion km²
Radius (km)58,232 km

Uranus:

Coldest planet in the Solar System (scientists have proven that Uranus occasionally reaches very low temperatures. The low temperatures are such as have never been attained by Neptune).

Distance from the Sun (Million Km)2869.6
Period of Revolution Around the Sun84 Years
Period of Rotation on Own Axis16 H and 10 mint
Mass time of Earth14.6
No. of Satellites27
Surface Area (Million km²)8.083 billion km²
Radius (km)25,362 km

Neptune:

Neptune has the coldest average temperature in the Solar System.

Distance from the Sun (Million Km)4496.6
Period of Revolution Around the Sun165 Years
Period of Rotation on Own Axis18 Hour
Mass time of Earth17.2
No. of Satellites14
Surface Area (Million km²)7.618 billion km²
Radius (km24,622 km

Some Important Fact About Universe

Astronomers estimated the age of our universe is 13.77 billion years.

Main component of the universe are hydrogen and helium. The study reveal that 74% of the mass is made up of hydrogen and 25% is helium.

The universe is flat not the earth. The estimated diameter of universe is over 150 billion light years.

The universe is not static, but rather is expanding and getting bigger day by day.

We live in the Milk way, one of the medium size galaxy in universe. It has more than 200 billion star and sun is one of them. It is dusty and gassy with invisible halo and a hole at center. The shape of our galaxy is spiral.

Some of the latest finding say that the number of galaxy in our universe is hundreds of billions. Hubble reveal that there estimated 100 billions galaxies in our universe and the number is likely increase 200 billion as the telescope technology improves in space.

The Sun is an average size star at the center of the Solar System.

Read More: Basic General Knowledge Questions

Source: https://solarsystem.nasa.gov/

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