While all seven planets could appear in some form in parts of the U.S., not all of them will be visible to the naked eye.

Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.

Seven planets are aligning in the night sky this week, creating a brief chance to see a "planetary parade." Worldwide, the best day to see the alignment is today, Feb. 28. Mercury, Venus, Mars ...

It's not often that planets align in the night sky. Attention, stargazers: Another celestial phenomenon is set to appear in the night sky Friday evening. Seven planets -- Mars, Jupiter, Uranus ...

We’ve heard of stars aligning—but what happens when the same goes for planets? That’s right, on Feb. 28, seven planets will align in extraordinary fashion: Venus, Mars, Jupiter, Saturn ...