Planets

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Planet is any of the nine largest objects that travel around the Sun. The Earth is a planet that travels around the Sun once a year. Going outward from the Sun, the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. The Sun, the planets and their satellites (moons), and smaller objects called asteroids, meteors and comets make up the solar system

 

 

Black holes
Black holes are the remains of collapsed stars. A tug of war is going on inside every star. On one side is its gravity, or pulling force, which is trying to make it collapse and become much smaller. On the other side is the energy pouring out from its core, which trying to make it explode. For most of a stars life, its gravity and its energy balance exactly. But when the stars core runs out of fuel, its gravity wins and the star collapses. The gravity around the star is now so strong that even its own light is sucked in making it invisible-a black hole in space.

Shooting stars
Shooting stars, or meteors, are the streaks of light you see at night. They are made by pea-sized bits of rock or metal called meteoroids, which fall from space and burn up in the Earths atmosphere.

 

People in Space
The first woman ever in space was Valentia Tereshova of the USSR (Now Russia). She began training to be a cosmonaut in 1962, and on 16 June 1963 She was launched into space in the spacecraft Vostok 6. She then spent more than two days orbitting the Earth.

Soviet cosmonauts have lived for as long as a year on board space stations orbiting the Earth. Doctors study the effects of these long space flights on the cosmonauts bodies, to make sure they stay fit and well.

The Soviet cosmonaut Alexei Leonov made the first spacewalk, on 18 March 1965. Leonov left the Voshkod 2 spacecraft and stayed outside for 24 minutes. A safety rope was tied on so he did not float away.


The Sun
The Sun is exactly the same kind of heavenly object as the stars that you see at night. This is hard to believe , because the Sun is so bright and hot and lights up the hole sky , while the stars are faint-so faint that they can be seen only when the sky is dark. The Sun is an ordinary star and the only real difference between it and the other stars is that it is much nearer to the earth.It is that makes it seem so much the brightest and hottest although there are many stars that are bigger , brighter and hotter than the Sun.

The Suns light and heat make life possible on earth. The light and heat come from nuclear reactions which take place deep inside the Sun. Its light is so bright that it can hurt your eyes, and YOU SHOULD NEVER LOOK DIRECTLY AT THE SUN

Men have been interested in the Sun since ancient times , when it was worshipped as a god. Modern astronomical study of the Sun began in the 16th century, when Copernicus stated that the earth went round the Sun. Until that time people thought that the Sun went round the earth. Observatories all over the world now make photographs of the sun on every clear day , and take moving pictures of the behaviour of its surface. The outermost parts of the Sun , called the corona , are photographed during eclipses , when its bright surface is hidden by the Moon or , at other times , with the special cameras called coronagraphs.

 There are two types of Eclipses and they happen for different reasons. An eclipse of the Sun takes place if the if the Moon passes in front of the Sun. Sometimes the Moon blocks out the Sun completely and for a short time day becomes night. This is called a total eclipse there are also eclipses of the moon. These happen if the full Moon passes Through the Earths shadow.

Astronomers have found out more about the Sun than about other stars, because it is so much nearer to the earth.

 

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