On the meteorite that fell in Antarctica, traces of a supernova explosion that died before the birth of the Sun

By cosmic standards, the Sun is a young star, its age is only about 4.6 billion years. Before the appearance

Entire suns in the Universe lived and diedgenerations of stars, but traces of their existence are extremely rarely discovered these days. Grains of presolar stardust remain in space objects - comets and asteroids, and researchers were able to discover one of these bodies.

Astrophysicists have found dust particles known asLAP-149, inside a primitive chondrite meteorite. Using ion and electron microscopy, the researchers found that the grain consists entirely of graphite and has an extremely high level of carbon isotope called 13C.

Like real stardust, so pre-solargrains give us insight into the building blocks that formed our solar system. They also provide us with a direct snapshot of the state of the star at the time the grain formed.

Pierre Henecourt, lead author of the study

Previously, scientists from the NASA Goddard Space Center found that small meteorites, which constantly fall on the surface of the moon, knock out up to 200 tons of water per year.