ASTRONOMY

The next supermoon will light up skies on Tuesday, February 19. This one will be a snow moon, a full moon that comes only at this time of year.

In 2004, the rover Opportunity landed on Mars. Originally intended to serve a mere 90-day mission, the rover instead beamed back scientific discoveries for more than a decade—and now its groundbreaking mission is over.

Few space stations want a body stinking up the place. Fortunately, there's always the garbage room.

Eris was once thought to be larger than Pluto.

Don't miss one of the best meteorological events of the year: The Geminid meteor shower is famous for its bright, frequent shooting stars.

It comes around every November.

The letter may solve a centuries-long mystery.

Happy first day of fall! The season of colorful foliage, frosty mornings, and pumpkin-spice everything is upon us, thanks to the autumn or fall equinox.

The hapless dwarf planet got demoted in 2006, but some stubborn scientists are still lobbying for reinstatement.

Your education shouldn't end when you graduate.

The baby planet is a few times bigger than Jupiter.

From a 17-mile-long particle accelerator to a football field–sized space observatory, these machines are marvels.