STAR DUST
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STAR DUST
Subject : Science & tech
Context : In six expeditions led over the last two decades, researchers led by those from CNRS in Paris have made an estimate of the amount of extraterrestrial dust falling on the Earth every year.
Concept :
- Stardust is formed by the material ejected from stars and carried by stellar winds, getting blown into interstellar space.
- The stellar wind is a flow of gas ejected from the upper atmosphere of a star.
- Interstellar space is defined as that which lies beyond a magnetic region that extends about 122 Astronomical Unit (AU) from the sun.
- During the solar system’s birth, this dust was incorporated into everything that formed including the planets and the sun but survived intact until now only in asteroids and comets.