Tag: our solar system

Mean solar day is the time interval between two successive noon when sun passes through zenith point (meridian).

Time taken by light to reach the earth from the sun is, 

Jupiter revolves or orbits around the Sun once every 11.86 Earth years, or once every 4,330.6 Earth days. Jupiter travels at an average speed of 29,236 miles per hour or 47,051 km per hour in its orbit around the Sun.
Hence, the planet Jupiter takes 12 years to go around the Sun.

The distance between the sun and the earth is $149,600,000 km$ which is approximately equal to $150$ million kilometers.

A solar day is the time it takes for the Earth to rotate about its axis so that the Sun appears in the same position in the sky, which is equal to $24\ hr\ 03\ min\ 55\ s$, i.e. in total, $86636\ seconds$.

Sun is regarded as the chief of solar system. It is because all of the other planets circle around it due to the gravitational pull because of its enormous mass.

The mean distance between the Earth and Sun as well as the distances within the solar system is represented by astronomical units.
One astronomical unit (AU) represents:
1 AU = 149,597,870.700 kilometers (or 149,597,870,700 meters)
An astronomical unit is the mean distance between the Earth and the Sun.

Out of these fours mercury takes minimum time to revolute one round. It takes $88$ days to do so.

Day and night are caused by  rotation of earth.