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The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Learn about the new perspective on Earth's reduction of moderately volatile elements, a discovery made possible by meteorites ...

Mars's moon Phobos is so strange that no one knows how it formed. But a forthcoming mission could solve this mystery - and a ...

If the solar system had a corporate structure, Jupiter would be the CEO, while Saturn ensures rules are followed. Venus ...

The article humorously imagines how planets would describe themselves if they were dating profiles. Each planet has a unique ...

Here’s what you should know when you go outside to see for yourself: Yes, the planets are indeed lined up across our sky. No, ...

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

The Moon and Jupiter will meet in the southwest sky at around 9.00pm GMT, where Jupiter will be shining bright to the left of ...

New research shows that meteoroid impacts on Mars generate seismic signals that travel much deeper than previously thought, ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

No matter how many missions to Mars she takes part in, the sheer joy of unearthing discoveries about the red planet never gets old for Mariek Schmidt.