NASA’s latest alert about a near‑Earth asteroid has revived a familiar mix of anxiety and curiosity about what would happen if a space rock really were on a collision course with our planet. The ...

Astronomers watched a distant star dim for months and found a metal-rich cloud that may be the aftermath of a massive ...

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Around the bright star Fomalhaut, astronomers spotted glowing clouds of debris left behind by colossal collisions between large space rocks. One of these clouds was even mistaken for a planet before ...