Origin of the Earth

Things to remember

• The origin of the earth is directly related to the origin of the solar system as the earth is a member of the solar system.
• Old planetesimal hypothesis state that very large amount of matter was thrown out of the sun due to the collision of the sun and another star.
• According to Nebular hypothesis, the sun and the planets were formed from a large whirling cloud of hot gases and dust.
• The new planetesimal hypothesis was slightly different from the old planetesimal hypotheses suggested by Buffon.
• According to the tidal hypothesis, a passing star had exerted a tidal pull upon the sun but the effect was to cause a long filament of gases to be drawn from the sun.
• Dust cloud hypothesis proposed that the sun and the planets were formed from a large cloud of gases and dust.