Solar System

111.	Who discovered the solar system?
	A. Galileo
	B. J. Ale. Baird
	C. Copernicus
	D. Kepler Option “C” is correct. In 1543, Nicolaus Copernicus detailed his radical theory of the Universe in which the Earth, along with the other planets, rotated around the Sun. His theory took more than a century to become widely accepted

112.	What are the celestial bodies that revolve around the Sun called?
	A. The planet
	B. Satellite
	C. Asteroid
	D. The tail star Option “A” is correct.

113.	What is a small celestial body revolving around a planet called?
	A. The planet
	B. Satellite
	C. Asteroid
	D. Solar Star Option “B” is correct. A celestial body orbiting another of larger size. : a manufactured object or vehicle intended to orbit the earth, the moon, or another celestial body.

114.	Who propounded the law of planetary motion?
	A. Newton
	B. Kepler
	C. Copernicus
	D. Galileo Option “B” is correct. Johannes Kepler is the scientist who has given the three laws of planetary motion. While Copernicus rightly observed that the planets revolve around the Sun, it was Kepler who correctly defined their orbits.

115.	How many planets are there in the solar system in total?
	A. Eight
	B. Nine
	C. Ten
	D. Eleven Option “A” is correct. Our solar system is made up of a star, eight planets, and countless smaller bodies such as dwarf planets, asteroids, and comets.

116.	Which one of the following is the correct order of the planets according to their increasing distance from the Sun?
	A. Mercury, Venus, Earth, Mars
	B. Mercury, Earth, Mars, Venus
	C. Mercury, Mars, Earth, Venus
	D. Mercury, Mars, Venus, Earth Option “A” is correct.

117.	Which one of the following is the correct order of the planets according to their increasing distance from the Earth?
	A. Mars, Venus, Mercury, Jupiter
	B. Venus, Mars, Mercury, Jupiter
	C. Venus, Mercury, Mars, Jupiter
	D. Mars, Venus, Jupiter, Mercury Option “B” is correct.

118.	According to the size, the descending order of the planets of the solar system is –
	A. Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars and Mercury
	B. Jupiter, Saturn, Neptune, Uranus, Earth, Venus, Mercury and Mars
	C. Jupiter, Saturn, Uranus, Neptune, Earth, Mercury, Mars and Venus
	D. Jupiter, Saturn, Uranus, Neptune, Venus, Earth, Mars and Mercury Option “A” is correct.

119.	Which of the following is not a part of the Solar System?
	A. Asteroid
	B. Comet
	C. The planet
	D. Nebula Option “D” is correct. A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova.

120.	Velocity of a planet revolving around the Sun-
	A. remains fixed
	B. is maximum when it is near the sun
	C. is maximum when it is away from the sun
	D. nothing can be said Option “B” is correct. When a planet is closest to the sun, it attains its highest orbital velocity, thus attaining maximum Kinetic Energy.

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