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How many planets are there in the solar system?
A. Seven
B. Eight
C. Nine
D. Ten
Correct Answer Is Option = Eight
Notes / Explanation
There are eight planets in the solar system, which move in orbit around the Sun at the centre of the system. The solar system consists of the Sun, which is a star, together with the planets and various other bodies that move around it, held by the pull of the Sun's gravity. The eight planets, in order of their distance from the Sun, beginning with the nearest, are a group of smaller, rocky planets closer to the Sun, followed by a group of larger, giant planets farther out. The four planets nearer the Sun are relatively small and are made mainly of rock, and among them is the Earth, on which we live. The four planets farther from the Sun are much larger and are giant planets made largely of gases and other materials, and among them is the largest planet of all, as well as the famous ringed planet. The planets vary greatly in their size, their distance from the Sun, and their conditions, and each has its own particular features. They all move around the Sun, each in its own path, taking different lengths of time to complete their journeys, with the planets nearer the Sun moving faster and completing their journeys in a shorter time, and those farther out taking much longer. It is worth noting that in the past a ninth body was also counted as a planet, but it was later reclassified as a different kind of body, a smaller kind sometimes called a dwarf planet, so that the number of planets recognised is now eight. Besides the planets, the solar system contains many other bodies, including the moons that orbit the planets, and various smaller bodies. The Earth, our own planet, is the third from the Sun, and it is the only planet known to support life. The study of the solar system, including the planets, their number, order and features, is an important part of the study of astronomy and of general knowledge. For PPSC and other competitive examinations, the key points to remember are that there are eight planets in the solar system, that they move in orbit around the Sun, that the four nearer the Sun are relatively small, rocky planets, including the Earth, while the four farther out are giant planets made largely of gases, and that a ninth body once counted as a planet was later reclassified as a smaller kind of body, so that the number of planets is now eight.
