Which craters spat out Martian meteorites?

Where do Martian meteorites come from? This seems like a tautological question, but in order to learn more about the geology of Mars, it’s important to find out where on the red planet these rocks originated before they ended up on Earth. “The only rocks we get from Mars are Martian meteorites,” says Dr Anthony … Continue reading Which craters spat out Martian meteorites?

Fossilised stardust found in meteorites

Like rocks on Earth preserving records of prehistoric times, some pristine meteorites hold records of ancient grains of stardust, and astronomers are now trying to trace these grains back to their stellar origins. These specks of stardust were forged in dying stars billions of years ago, becoming part of the debris that helped to form … Continue reading Fossilised stardust found in meteorites

Grains of dust revise Solar System history

Asteroids that formed far out in the Solar System appear to contain dust grains that themselves condensed from the infant Solar System’s protoplanetary disc much closer to the Sun, scientists say. That means this dust was somehow transported from the inner reaches of the disc to its outer reaches, says Curtis Williams, a geochemist at … Continue reading Grains of dust revise Solar System history

Tracing the origin of oddball meteorites

The earliest objects in the Solar System may have been more complex than scientists have assumed. New research suggests a group of strange meteorites first discovered in the 1960s came from an early planetesimal with melted and unmelted layers and a liquid metallic core substantial enough to generate a magnetic field possibly as strong as … Continue reading Tracing the origin of oddball meteorites

Fireball over SA could have been a “Minimoon”

Rocks explode in Earth’s atmosphere fairly regularly, and at first glance a bolide spotted over South Australia in 2016 seemed like just any other. However, researchers using an outback network of cameras called the Desert Fireball Network have revealed this was no ordinary rock. Instead, they have suggested the 2016 bolide was in fact a … Continue reading Fireball over SA could have been a “Minimoon”