Planets are celestial bodies which revolve around stars.

They have sufficient mass so that Under the influence strength gravity purchase hydrostatic equilibrium (approximately spherical form) and clean neighborhood of its orbit from others objects.

In Solnechnaya system eight planets:

Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Planets

vary By size, mass, composition, atmosphere And temperature.

Earth - the only one planet, on which known life.

People

Always were interested planets.

They

observed behind them V telescopes, sent To him space devices And even landed on some from them.

Studying

planets allows us better understand Sunny system And our place in it.

Interesting facts about planets:

The most The largest planet in the solar system is Jupiter. The most small planet in the solar system - Mercury. The only one planet in the solar system with liquid oceans on the surface Earth. The most the hottest planet in the solar system is Venus. The most cold planet in the solar system - Neptune. Planets - This priceless gift nature, which We must take care And respect.