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Ground-based telescopes have a fundamental problem that no amount of engineering can fix. They’re trying to observe the universe through Earth’s atmosphere, a constantly moving blanket of air that distorts and blurs incoming light. It’s…

Mars wasn’t always the bone-dry world we see today. A new study reveals the Red Planet experienced a series of ice ages, much like Earth, but with a twist.

Instead of regaining water with each cycle, Mars steadily lost it. And now, clues…

Hundreds of satellites may soon be flying in orbital regions that are already too packed to allow safe and long-term operations, a new study suggests.

The study found that, while in 2019 only 0.2% of satellites in Earth orbit were forced to…

Two annual meteor streams are now active that have the potential to spawn dramatic fireballs in the weeks leading up to their November peaks.

As their names suggest, meteors from both the Southern Taurid and Northern Taurid meteor showers appear…