Articles on Asteroids

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An electron microscope image, colorized, shows different structures of pollen grains, including sunflower, morning glory and primrose. Dartmouth Electron Microscope Facility

Ancient pollen reveals stories about Earth’s history, from the asteroid strike that killed the dinosaurs to the Mayan collapse

Palynologists who study tiny pollen fossils share 4 stories found in grains that fell hundreds to millions of years ago.
The Earth formed in a ring of debris around the Sun, like the one around Vega, a bright star, in this artist’s conception. NASA/JPL-Caltech

How was the Earth built?

The Earth started as a mixture of gas and dust around the Sun and grew as it collided with asteroids and dust particles.
This image overlays over 100 fireball images recorded between 2016 and 2020. The streaks are fireballs; the dots are star positions at different times. Desert Fireball Network

Why the meteorites that hit Earth have less water than the asteroid bits brought back by space probes – a planetary scientist explains new research

Water-rich meteorites contain key ingredients for life, yet they barely appear in meteorite collections. Recent research using shooting stars may explain why.
An artist’s rendition of one of the many thousands of near-Earth objects that could potentially impact Earth in the future. (European Space Agency/P.Carril)

What are the chances an asteroid will impact Earth in 2032?

In mid-February, asteroid 2024 YR4 was spotted and originally believed to have a 3.1 per cent of hitting Earth in 2032. Further calculations revealed this was not the case.

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