The history of the solar system written in comet dust


04/01/2008

Four years ago, the spacecraft NASA Stardust, chasing a comet, collected cosmic dust particles spewing its core. Upon return of the spacecraft, comet dust, called Wild-2, sold by laboratories around the world, including the University of Minnesota and his physics professor Bob Pepin (Bob Pepin, University of Minnesota).

It is believed that the comet Wild-2 was born in the Kuiper Belt (or Kuiper Belt Edgeworth-Kuiper Belt - Solar System beyond the orbit of Neptune. This area has a large number of space objects, the most famous of which is Pluto.). Since the temperature in the area around-217oC, the comet has incorporated not only cosmic dust, but also the surrounding gas.

After studying the gases helium and neon, hidden away in dust particles, Pepin and his colleagues reported that although the comet was formed on the icy outskirts of the solar system, the dust itself has formed near the young sun and exposed to the powerful radiation exposure above and other gases before it was thrown out beyond the orbit of Jupiter and a comet hit.

This finding sheds light on the time of the early life of the solar system, the fact that there could be such that the radiation caused the terrible force, and what force threw dust for hundreds of millions of kilometers away from the place of birth.

The study of cosmic dust from comet Wild-2 is theoretically allow scientists to recreate the conditions under which our solar system formed, the earliest stages of the formation of its celestial bodies. One of the earliest events, called by scientists, is the birth of the moon about 50 million years after the formation of the solar system.

In addition to dust, the study of gases in the comet will find out the truth of another scientific theory, which states that comets brought helium and neon in the atmosphere of Earth, Venus and Mars. You can always download the news ticker and be aware of all the world’s news.

Original: Eurekalert.org


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