Prior to 2040, the last planetary quintuplet occurred in the year 1186, and according to Uptain, records show that the close ...

Credit: Created in Canva by Daisy Dobrijevic, Image from the Virtual Telescope Project livestream poster. Seven planets ... parade — occurs because the planets orbit the sun on a relatively ...

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.

All the planets orbit roughly along the same plane, known as an ecliptic plane, or arc across the sky if you are viewing it edge-on, according to NASA. NASA recommends observing the planet parade ...