The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking Earth eight years from now.
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Unknown asteroid flew past Earth closer than a satellite—and we didn't spot it until hours later
Astronomers were slow at spotting a small giraffe-sized asteroid that zoomed past our planet on Tuesday, September 30, 2025, at 8:47 p.m. EDT. The encounter was not discovered until hours later as the ...
The asteroid gave us a reminder of our planet's vulnerability and the value of vigilant sky surveys. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...
The day marks the anniversary of a large meteor impact in Siberia on June 30, 1908. This is known as the Tunguska event. As the meteor entered the atmosphere, it exploded several miles above the ...
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