The Solar System is home to a remarkable range of planets, from tiny rocky worlds to massive gas giants. But just how big are ...

But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...

On September 7, the moon will turn a coppery red during an 82-minute eclipse, one of the most widely seen celestial shows of ...

The Psyche spacecraft is on a six-year journey to reach a metal-rich asteroid by the same name. Well into its voyage, the ...

On Sept. 7, a total lunar eclipse will adorn the night sky with its crimson hues, as the Earth slowly eclipses the moon. Here ...

Ever since its formation around 4.5 billion years ago, Earth's rotation has been gradually slowing down, and its days have ...

August’s full sturgeon moon is peaking this weekend, accompanied by meteor showers and shining planets. Here’s how to see the ...

Because oxygen seeps (diffuses) out of mats slowly, the timing of sunlight becomes a big deal. Short days mean the sun sets ...

In an exciting development in the pursuit of extraterrestrial life, NASA has uncovered and mapped out underground oceans on ...

Asteroid 2025 QD8 is heading our way, but you’ll be pleased to know that it’s not on a collision course with our planet, ...

The asteroid known as 2024 YR4 is out of sight yet still very much on scientists' minds. It now poses a threat to the moon, rather than Earth.

Did you miss the planetary parade? Well, Thursday, Aug. 21, is the last day to see it, along with the crescent moon. Usually, ...