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Wednesday, 31 January 2018

Effects Of Moon On Earth:

Effects Of Moon On Earth:


The shadows the Earth and Moon throw in space cause total or partial eclipses of the Moon and Sun.

Lunar Eclipse:

Earth revolves round the Sun and the Moon revolves round the Earth, being its satellite. Clearly many a time the Earth comes between the Sun and the full Moon casting a shadow on the Moon. This is called an eclipse of the Moon.

Solar Eclipse:

A solar eclipse can take place when the Moon comes between the Sun and the Earth. It occurs only at new Moon because. Moon's orbit is not in the same plane as that of the Earth.


Another effect of the Moon on Earth is caused by Moon's gravity. Invisible fin of gravity from both Sun and Moon draw the Earth's water together into tidal bulges, which surge up and down 'he shore lines everyday. As the Moon is nearer than the Sun it has more than twice the Sun's influence on the Earth's tides.

Spring Tides:

Twice a month, at new and full moon, the tidal pulls of the Moon and Sun coincide because they happen to be in the same line and produce so called spring tides which are about 20% higher than normal.

Neap Tides:

In between the new and full Moon i.e at the Moon's first and last quarter, the Moon and Sun are pulling at right angles. Then the net tidal force is 20% less than average, producing neap tides.


In addition to the principal planets and their satellites, there are many other bodies which roam about the Sun. These bodies are asteroids, comets and meteoroids. The asteroids are sometimes known as planetoids, small planets which move around the Sun between the large gap of Jupiter and Mars. This gap is about 547 million km. and is known as the asteroid belt. These are thousands of rock — and — metal bodies ranging from hundreds of kms. to a few metres across. They are believed to be debris left over from the formation of the inner planets of the solar system. Their total number may be about 100,000. Among the brightest are Pallas (560 km. across),and Besta (500 km. across). The combined mass of all asteroids is probably about one thousandth. that of the Earth. I hey are too small to retain any atmosphere. and none of them is likely to harbour any form of life. Some asteroids have eccentric orbits that take them well ~ beyond the orbits between Mars and Jupiter. Hidalgo can retreat from the Sun as far as the orbit of Saturn, while Icarus approaches even closer to the Sun than Mercury does.
Alifye - Effects of Moon - Adroids


The word comet is derived from the Latin word "Long —haired". The comets are the tail — stars and are the objects of the solar system. On average about 5 new comets are discovered every year. Most comets are very faint. A comet is a body of gas and dust traveling in an elongated orbit round the Stilt. When far from the Sun. a comet's gases are frozen. It shines only by reflected sunlight, and appears very faint. But as the comet approaches the Sun, its gases warm up and evaporates, releasing material which forms a long, flowing tail. This always points away from the Sun. and may be as lorig as 160 million km. The direction of the tail and its glow are caused by the comet's gases reacting with atomic particles that stream out from the Sun. The brightest of the periodic comets is Halley's which orbits the Sun in 76 years. It will next appear in 2062. Comets are insubstantial bodies. The largest comet is probably less than a millionth of the Earth's weight.
Alifye - Effects Of Moon - Comets


The word meteoroid is a broad one and includes meteors, fireballs, meteorites and micrometeorites. The source of meteorids is not known. Meteors, popularly knosyn as the "shootng stars" are believed to be the debris from comets. These are particles from space which burn up by friction in the Earth's atmosphere. Most meteors are between the size of a grain of sand and that of pea, and as they burn up they appear as bright streaks in the sky. Millions of meteorids pass into our atmosphere but only two or three a day can reach the Earth. Rest are burnt in the atmosphere. These meterods are kTows as meteorites. These are chunks of rock or metal from space large enough to pass though the atmosphere of planet without burning up and to reach its surface. These are believed to be fragments broken off asteroids. Some are big enough to carve a crater when they hit the planets surface e.g. on the Moon. Mars and Mercury.
Alifye - Effects of Moon - Meteoroids

Saturday, 27 January 2018

The Moon

The Moon:

The Moon is the Earth's only natural satellite. Compared to •satellites of other planets, it is very large in relation to its parent planet. It is a quarter of the Earth's diameter measuring 3476 Km. Its distance from the Earth is 384,405 km. It orbits the Earth once a month, keeping the same face turned towards Earth as it does so. Its surface is pitted with craters caused by Meteorites. Moon is the same age as the Earth about 4,600 million years. The moon is a not a self - luminous body. The Earth and Moon travel around a common center of gravity in space.
Alifye - The Solar System - The Moon

The result is that the Earth weaves slightly from side to side in its elliptical path round the Sun with the Moon orbiting it once a month. As the Moon orbits the Earth different amount of its sunlight surface are visible from the Earth. This produces the cycle known as 'Phases of the Moon. We can see the full - Moon and no- Moon once in a month. and for rest of the days it appears in its phases. The average daily delay in Moon - rise and Moon - set is about 50 minutes. The Moon is lacking \eater and it has no atmosphere. A very light 'rain' of cosmic dust continually falls._ the glare of the Sun. lunar rocks reach a temperature of 110 C, More than the boiling point of water. But in shadows the temperature goes down to less than --- l 00 C.



Diameter at equator--- about 6,000Icm.
Means distance from Sun- 5.900 million km.
Orbits Sun in ---- 247.7 \tars.
Rotates on axis in--- 6 days 9 hours
Number of satellites- 0.
Mass--- 0.1 times that of Earth.
Surface gravity-- not known.
Alifye - The Solar System - Pluto

It is farthest from Sun—the outermost planet. Its distance from the Sun varies widely from the average. At its closest_ it crosses the path of Neptune. making Neptune the outermost planet. It will be closer to the Sun than Neptune between January 1977 and march 1999.



Diameter at equator--- 49500km.
Means distance from Sun- 4496.6 million km.
Orbits Sun in --- 164.8 years.
Rotates on axis in--- 16 hours.
Number of satellites- 2.
Mass--- 17.2 times that of Earth.
Surface gravity---- 1.18 times that of Earth.
Alifye - Solar System - Naptune

It is a large planet lying near the edge of the solar system. Under its cloudy blanket there is believed to be a core of rock sheathed with ice stretching for, about two - thirds its diameter.



Diameter at equator--- 518001an. 
Means distance from Sun- 2869.6 million km. 
Orbits Sun in 84.01 years. 
Rotates on axis in --- 11 hours 
Number of satellites - 5. 
Mass--- 14.6times that of Earth. 
Surface gravity-- 1.17 times that of Earth.
Alifye - The Solar Sytem - Uranus

It is the seventh planet of solar system. It is twice as far from the Sun as Saturn.

Tuesday, 23 January 2018



Diameter at equator-- 120,000km. 
Means distance from Sun- 1427 million km. 
Orbits Sun in --- 29.46 Earth years. 
Rotates on axis in--- 10 hours 14 minutes . 
Number. of satellites- 10. 
Mass--- 95.2 times that of Earth. 
Surface gravity-- 1.15 times that of Earth.
Alifye - The Solar System - Saturn

Saturn is the ringed planet and its twice as far as Jupiter from the Sun. It is yellowish in colour. Saturn is 95 times massive than the Earth. It is a pique planet which has got rings.



Diameter at equator--- 142800Ian. 
Means distance from Sun- 78.3 million km. 
Orbits Sun in --- 11.86 years. 
Rotates on axis in--- 9 hours 50 minutes 30 seconds. 
Number of satellites- 14. 
Mass-- 317.9 times that of Earth. 
Surface gravity---- 2.64 times that of Earth.
Alifye - The Solar System - Jupiter

It is the largest planet and is more massive than all the other planets combined. It is brighter in our skies than any other planet except Venus and occasionally Mars. It is yellowish ,in colour. The speed of its rotation round its axis, at the equator exceeds 25,,000 miles an hour. The internal structure of the Jupiter is very different from that of the Earth.

Friday, 19 January 2018



Diameter at equator ---- 6787 krn. 
Mean distance from Sun — 227.9 million km. 
Orbits & din --- 687 days. 
Rotates on axis in --- 24hrs 37 minutes 23 seconds. 
Number. of satellites. ---2
Mass---- 0.108 times that of Earth. 
Surface gravity--- 0.38 times that of Earth.
Alifye - The Solar System - Mars
Outermost of. the terrestrial planets. About 70 per cent of the Martian surface is reddish or yellowish blue. Apart from the Earth. Mars probably provides a better abode for life than any planet in the solar system. Even so the prospect is not pleasant: atmospheric pressure is much lower than a top Mount Everest; average temperature is very low; a desert like surface exists in most places with occasionally vigorous sand storms, and water a commodity very hard to come by. There is no, evidence for the presence on Mars of less hardy flora or fauna. Phobos and Deimos are two tiny satellites of Mars.

Tuesday, 2 January 2018

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