METEORS

Meteors are small particls  ,usually smaller than  a grain of sand, moving freely around the Sun. A Meteor cannot be seen in space as it is very small but  is heated  by  friction when it enters the Earth’s   atmosphere . It is destroyed but during the process it  produces…

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Minor planets or asteroids

The diameter of the  asteroids is small, and the largest of them has a diameter of 623 miles. Their orbits are very eccentric.  The  number of asteroids is very great which is  estimated to be 40,000. Due to their low masses, the  escape velocities will be low. All of them have…

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Non-periodic comets

Non-periodic comets are much more numerous than periodic. These comets are seen only once and after  that they are lost in the space and never come buck.

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Encke’s Comet

Its periodic/time is 3.3 years. At perihelion, it comes closer to the Sun than does Mercury and at aphelion, i.e. at its greatest distance, it is more than   4  times the Earth’s distance from the Sun.

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Hailey’s Comet

Halley’s comet was first seen in 1531 and afterwards in 1607, 1682, 1758-59, 1835, 1910 and last on 9 February 1986. It has a period of 76 years. Its next return is expected in 2061.

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COMETS

Comets differ widely from the planets, both in their physical state and in the nature of orbits described around the Sun. Comets are generally a brilliant nucleus surrounded by nebulous matter stretching out into an elongated tail. All the comets do not develop tails and many are nothing more than…

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PLUTO

The pluto is the ninth planet. It was discovered by Clyde Tombaugh in 1930. Its orbit is most eccentric of all the planets. For most of the 248 years period, it is much further out than Neptune; but near, perihelion, it is closer to Sun than Neptune. Its mean distance…

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NKPTUNE

As a result of calculations by Leverrier and Adams, Neptune was discovered in 1846 by J Galle  and  H D Arrest, at the Berlin observatory. Its distance is 2793 million miles and sidereal period 164.8 years. Its  brightness is even much less than that of Uranus, and it is very faint.

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URANUS

Uranus was discovered by William Herschel in March 1781. The planet is known as Herschel also alter the name of its discoverer. Five satellites are Known till now. It is very far. Its distance is about 1783 million miles and its diameter is only about 32,000 miles. Hence, it is…

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SATURN

Saturn is the sixth planet in order of distance from the Sun. Its mean distance from the Sun is 886 million miles and diameter is about 74,000 miles. Its density is less than water. It is much larger and more massive than any other planet (except Jupiter). Its m bit…

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