Mercury

Could Mercury's close orbit to the sun help the planet generate ice? This sounds like a paradox, but a new study shows how it could happen.

Mercury is often cited as the most difficult of the naked-eye planets to see due its proximity to the sun, but there are times during the year when Mercury can be surprisingly easy to spot.

There are no hurricanes on Mercury, but there is plenty of water ice — and observing that ice can help scientists deal with the lingering effects of a very terrestrial hurricane.

Near the edge of Jamaica Bay in New York City, about a dozen people gathered to watch Mercury travel across the sun.

On Nov. 11, people across most of the world can catch the planet Mercury passing across the sun. This rare event won't be seen from Earth again until 2032.

If you missed Mercury's journey across the sun Monday (Nov. 11), you're in for a bit of a wait for the next sun-transiting planetary occasion.

The tiny planet Mercury scooted across the sun's face today (Nov. 11) for the last time until 2032, and skywatchers around the world had the chance to witness the rare celestial event.

When Mercury passes in front of the sun on Monday, you'll need the right equipment to see it safely. But if you don't have that kind of astronomy gear handy, you can also watch it live online.

On Nov. 11, 2019, the planet Mercury crossed the face of the sun in a rare Mercury transit. See amazing photos of the transit, the last until 2032, from NASA and around the world!