Know About Our Earth, Shape, Hemisphere, Atmosphere of Our Solar System

Our planetary system is located in an outer spiral arm of the Milky Way galaxy. Our solar system consists of our star, the Sun, and everything bound to it by gravity — the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, dwarf planets such as Pluto, dozens of moons and millions of asteroids, comets and meteoroids. Beyond our own solar system, we have discovered thousands of planetary systems orbiting other stars in the Milky Way.

The Earth:-

Shape: It is Almost spherical with a little flattering at the poles and Slight bulge at the center.

        Land Area                         :           Water Area = 29:71

        Total Surface Area           :           510,100,500 sq km.

        Mean Radius                     :           6,367 km

        Mass                                  :          5880 * 1021 tons

             Period Of Rotation           :          23 hours 56 min and 40.91 sec.

        Period Of Revolution       :          365 days 5 hours 48 min and 45.51 sec.

                                                                                                  

In Northern Hemisphere : 

The longest day and shortest night      :   June 21

The shortest day and longest night      :   December 21

 Equal day and Equal night                    :   March 21 and September 23

Composition Of The Atmosphere :

Nitrogen    : 78.09%

Oxygen      : 20.95%

Argon         :  0.93%

Carbon dioxide and other  : 0.03%

The Earth