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W hat’s your first star memory? You probably observed the three luminaries of Orion’s Belt before anything else. Most kids notice it even before the Big Dipper or, in places Down Under, the Southern ...

Astronomers have spotted an intriguing cluster of objects in the Kuiper belt, an enormous, donut-shaped region of icy objects ...

This strange world also quite possibly hosts a hidden exoplanet. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. In 1958, shortly after launching ...

The asteroid belt between Mars and Jupiter contains ancient, ice-covered rocks that may have delivered much of Earth’s water ...