stars - planetary bodies. Each star - a giant red-hot ball. The temperature at its surface is different. From the surface temperature depends on the color of the stars.

Stars is a group called constellations. Back in ancient times people have given names for the constellation of their similarity to different subjects. For example, is the constellation Ursa Major, Ursa Minor, Sagittarius, Pisces and others.

seem tiny stars that are very far from Earth. The nearest star to Earth - the Sun. Distance from Earth to the Sun 150 million km. And to another nearby star - in 270 000 times more.

stars are different sizes. Sun - the star of average size. Its diameter - 1 million 392 thousand miles. Other stars in billions of times larger than the Sun, or much less of it.

Solar System

temperature on the surface of the sun reaches 6 thousand degrees, and deep - to 15 million degrees. In this temperature all substances that make up the Sun, are in the hot gas. Because the sun constantly emits plenty of light and heat.

sunlight and heat lit and warmed the planet, moving around the Sun.

Planet does not emit light and heat. It is - cold planetary bodies. their lights and heats the sun.

Planets seem bright stars. This is because they shine the reflected sun light.

The way the planet moves around the Sun, called orbit.

Most are natural satellites of planets - planetary bodies. They move around the planets in their orbits. Earth has 1 satellite - the Moon, Mars - 2 in Jupiter - 16, and Saturn - 18 satellites.

moving around the Sun as asteroids, comets and meteors.

Sun and planetary bodies - planets and their natural satellites, asteroids, comets, meteors, which move around the sun - the solar system formed .