Comets & Life ?

NASA just discovered the basic building block of life out side our earth rather our solar system. NASA space craft Stardust took specimen after following the tail of Comet Wild 2.

Our planet was made by simple block of life and that is the Amino acids. But the question arises that from where these acids came from; were they already on earth, or were they formed by the extreme hazardous environment. Scientists then came up with a theory that what if the Amino acids were some how thrown in the atmosphere or came from some other external source.

For this the scientists looked at the stars and the other objects which orbits the earth and the objects which crash in. The Comets were the biggest doubt that they must be the carrier of these acids and when the passed by they would enter the Earth. Comets are made up of ice and dust and when they pass by the star (like our sun) they get heated up sending a trail of dust. These dust trail some how contained amino acids which eventually end up here when they pass Earth.

Scientists concluded nearly two years of painstaking research on comet samples returned by the Stardust probe to confirm that glycine; one of 20 known amino acids that form the building blocks for life on Earth — was in the comet Wild 2, and not the result of terrestrial contamination.

NASA’s Stardust spacecraft captured samples of gas and dust from Wild 2 in 2004. The material parachuted to Earth in 2006. Since then, scientists around the world have been analyzing the samples to learn the secrets of comet formation and our solar system’s history.

Particle Captured by Star Dust probe

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