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Ancient grains of dust from space can be found on Earth − and provide clues about the life cycle of stars

  • Written by Sachiko Amari, Research Professor of Physics, Arts & Sciences at Washington University in St. Louis
In space, orange, blue and black clouds swirl together with stars visible through the haze.The dark areas in this image of the Carina Nebula are molecular clouds.NASA, ESA, N. Smith (U. California, Berkeley) et al., and The Hubble Heritage Team (STScI/AURA)

In space, there are clouds that contain gas and dust ejected from stars. Our solar system was formed 4.6 billion years ago from such a molecular cloud. Most of these dust grains were...

Read more: Ancient grains of dust from space can be found on Earth − and provide clues about the life cycle...

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