Tag: asteroid

Unexpected mineral in a Ryugu grain challenges paradigm of the nature of primitive asteroids

ASTRONOMY
The pristine samples from asteroid Ryugu returned by the Hayabusa2 mission on December 6, 2020, have been vital to improving the understanding of primitive asteroids and the formation of the solar system. The C-type asteroid Ryugu...

Meteorite-common amino acid induces formation of nanocavities in clay mineral, hinting at life’s origins

ASTRONOMY
Researchers at the universities of Amsterdam and Utrecht have observed the formation of nanocavities in montmorillonite clay under exposure to gamma-aminobutyric acid, a molecule commonly found on meteorites. This hitherto unrecognized phenomenon could be relevant to...

Life recovered rapidly at site of dino-killing asteroid. A hydrothermal system may have helped

EARTH
About 66 million years ago, an asteroid slammed into the planet, wiping out all non-avian dinosaurs and about 70% of all marine species. But the...

Rising odds asteroid that briefly threatened Earth will hit moon

ASTRONOMY
A huge asteroid that was briefly feared to strike Earth now has a nearly 4% chance of smashing into the moon, according to new...

Asteroid impact threat estimates improved for the Earth and the moon

ASTRONOMY
Asteroid 2024 YR4, first discovered in December 2024, triggered a first-ever notification from the International Asteroid Warning Network (IAWN) on January 29, 2025. The...

Mammals were adapting from life in the trees to living on the ground before dinosaur-killing asteroid, research reveals

PALEONTOLOGY
More mammals were living on the ground several million years before the mass extinction event that wiped out the dinosaurs, new research led by...

A geologic map of the asteroid belt: Tracing meteorites back to their origins

ASTRONOMY
Where do meteorites of different types come from? In a review paper in the journal Meteoritics & Planetary Science, astronomers trace the impact orbit...

Remember that asteroid that isn’t going to hit Earth? We could send a mission to explore it

ASTRONOMY
Last year, astronomers detected the near-earth asteroid (NEA) 2024 YR4, which orbits the sun every four years and periodically crosses Earth's orbit. The nature...

An asteroid has a 2% chance of hitting Earth in 2032. Here’s how astronomers are tracking it

ASTRONOMY
A recently discovered asteroid, named 2024 YR4, has on average a 2% chance of hitting Earth in 2032. While those odds of an impact...

Asteroid Ryugu samples suggest presence of salty water in outer solar system

ASTRONOMY
Asteroids that orbit close to the Earth inevitably cause us some anxiety due to the even remote possibility of a collision. But their proximity...

How an ancient asteroid strike carved out 2 grand canyons on the moon

ASTRONOMY
New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons on...

Pristine asteroid samples reveal secrets of the ancient solar system

ASTRONOMY
The key to the new discovery was the pristine condition of the samples. Many of the salts present degrade quickly when exposed to the atmosphere....

Asteroid the size of a 20-story building headed for Earth in 2032, astronomers warn

ASTRONOMY
A large asteroid is headed towards Earth – and could collide with us in just a few years. Known as Asteroid 2024 YR4, the nearly...

A ‘city-killer’ asteroid might hit Earth—how worried should we be?

ASTRONOMY
A colossal explosion in the sky, unleashing energy hundreds of times greater than the Hiroshima bomb. A blinding flash nearly as bright as the...
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