Wednesday, December 26, 2012

Earth and the solar system:



Live on the surface of the planet. And although this may seem strange at first glance, the planet actually spherical! There are several simple proof of this, for example, when the note ship away on the horizon, we first see the disappearance of the bottom and then the upper part gradually disappears. This is clear evidence of the uneven ground. As well as the earth revolves around the same,
and this is the reason for the alternation of night and day, and the reason that might make us think that the sun is orbiting the Earth! As that, although strange it is the earth that revolves around the sun and not vice versa. And there are several signs of this, although it is not simply evidence of the roundness of the Earth. As humans known since antiquity that the earth is spherical, but thought for centuries that the sun and all other planets revolve around the Earth. Confine ourselves in this section by saying that the premise of the rotation of the sun around the earth we expected in contradiction and make calculations extremely complex.
Star and the sun is no different in nature from the rest of the stars that you see at night. The only difference is the dimension. As the closest star to us after the sun is located at a distance of approximately 250,000 visits dimension between us and the sun! And for this it during the day sunshine dominates the light of the rest of the stars, and we can not enjoy seeing them but by nightfall and that although many of the greatest stars brighter than the sun.





And our planet belongs to a group all other planets revolve around the sun. This group, called the solar system, comprising nine planets, including Earth. And (near to far relative to the sun): Mercury, Venus, Earth, Mars, Jupiter, Saturn, Auros, Neptune and Pluto. And owns some of these planets, moons or more spins around. The land has one satellite, while Mars has two satellites. The group also contains solar on several other celestial car Kalkwakb and comets ... And the planets are different from stars through nature and through the virtual movement in the sky.

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