A piece of ancient space rock that ended up on Earth is giving scientists the clues they need to understand the cloud of dust from which the Solar System was born.
, and an isotope contained within it suggests a sprinkling of radioactive material from recently exploded stars infused with our Solar System towards the end of its formation.
It's a fascinating glimpse into the solar environment billions of years ago, showing not just how meteorites can serve as time capsules preserving the secrets of the past, but that those secrets can then be used to better understand what we find in other space rocks. The Sun, like all stars, was born from gas and dust. The solar nebula was a dense cloud floating in space, with a denser region that would collapse under gravity to form a baby star, spooling in more and more material as it spun and grew. Once the Sun had swallowed its fill, the remaining disk of material went into forming the planets.We have a rough idea what was in the nebula.
Meteorites and asteroids, by contrast, are thought to represent a relatively pristine sample of the Solar System at the time these objects formed, since they have remained more or less
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