Tag: solar system and sun

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, 

Ursa Major constellation lies in the northern sky. Its name means “the great bear,” or “the larger bear,” in Latin. The smaller bear is represented by Ursa Minor. Its brightest stars form the Big Dipper asterism, one of the most recognizable shapes in the sky, also known as the Plough.

Ursa Major is called as Saptarishi as it has seven prominent stars.

• Sun is star, which emits light from its own sources of energy. Remaining options Earth, Jupiter,Saturn and Venus are planets that revolve around the Sun and shine by the light of Sun.
• Hence, Sun is the odd one in given options.

Galileo observed that Venus goes through a full set of phases, which is only possible if Venus orbits the Sun. This observation directly contradicted the Ptolemaic (geocentric) model, which could not account for the full range of phases.

Most of the planets orbit the Sun very near the same plane in which the Earth orbits, the ecliptic.
The orbits of the planets are ellipses with the Sun at one focus, though all except Mercury are very nearly circular. The orbits of the planets are all more or less in the same plane (called the ecliptic and defined by the plane of the Earth's orbit). The ecliptic is inclined only 7 degrees from the plane of the Sun's equator.
Hence, the statement is true.

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.