Though the alignment isn't once-in-a-lifetime rare, the seven other planets in our solar system don't align every year, so it can be a spectacle to witness.Start the day smarter. Get all the news you need in your inbox each morning.

Houstonians will be able to see seven planets in the sky this weekend in what's called a planetary parade. Unfortunately, however, some may not be spotted with the naked eye. Just after dark, it will be possible to view Mercury,

Lineups of four or five planets occur every few years, according to NASA. In late August 2025, four planets will be visible before sunrise, and in late October 2028, five planets will be visible at once before sunrise. Another five-planet alignment will occur in late February 2034, with the planets visible after sunset.