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.

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 ...

Planets in the box have the right atmospheric ... The cold gas giants are literally off the chart. The logarithmic scale used initially here allows for an easier comparison of the exoplanets.

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 ...