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 destroyed during solar system formation.
Ancient Grains Of Dust From Space Can Be Found On Earth
Some grains are older than our solar system.
Aug 9, 2024 6:00 PM
Presolar grains like this one existed billions of years ago in molecular clouds before making it to Earth in meteorites. Provided by Sachiko Amari
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