Asteroids are small planetary bodies, too small to be classified as a planet. Asteroids are made up of rocky materials, and they orbit the sun. In our solar system, a vast number of asteroids exists together in the 'great asteroid belt' a region between the orbit of Mars and Jupiter. A comet is a ball of frozen gas, rocks and dusts, that travels around the sun in the solar system. Comets can be as big as a small town. When the orbit of a comet brings it close to the sun, it melts, leaving a trail of gas behind it. This trail of gas is the characteristic long tail of a wishing star seen in the sky in some clear night.
<em>The common property of a comet and an asteroid is that they both travel around the sun in the solar system, just like every other planetary body in the solar system.</em>
The gravitational force between Earth and the moon is strong. But the force is not strong enough to pull the moon towards us. That's why the moon doesn't fall on Earth.
In order to understand the earth and its climatic patterns, we need to have a deeper understanding of how the system of the earthworks and for that six spheres provides us with an adequate amount of information for documentation of climate change.
The direct sources of data are modern climatic records and the indirect is the past and old climatic data that ay or may not be connected directly.
