Seven planets are on display in the night sky at the end of February, but some will be harder to spot than others. Here’s ...

And now, after a decade-long analysis, Sontag and his colleagues have figured out how to use such feathers to create a living map of the mercury contamination that increasingly threatens Southern ...

A "great planet alignment" will be adorning the skies on Friday. According to astronomers, the rare event won't happen again for another decade. Here's what to know.

While the weather might be tough for seeing it tonight, there's a chance to see a 7-planet alignment in the skies tonight in Massachusetts. Supposedly, this will be the last such alignment of planets ...

According to NASA, multi-planet lineups are visible "every few years," but a seven-planet alignment is particularly uncommon, as each planet's orbit varies, with some moving more quickly and Mercury, ...

On Friday, just after dusk, seven planets will align as Mercury joins Mars, Jupiter, Uranus, Neptune, Venus and Saturn, ...