On July 20, a rare celestial event known as the “Seven Sisters Eclipse” will occur, as the Moon passes in front of the Pleiades star cluster — also called the Seven Sisters — creating a stunning sky display visible to many in the U.S. and Canada.

“Commonly called the Pleiades or Seven Sisters, M45 is known as an open star cluster,” NASA explains. Although over 1,000 stars make up the group, only six are bright enough to be seen with the naked eye. One of the “sisters” is always missing in global myths — possibly because a seventh star once visible has since become harder to see.

Astronomers say this event is part of a regular cycle. “It has really been visible each month since September 2023 and will remain so until July 2029,” according to *timeanddate.com*. However, what makes July 20 special is the Moon will pass *directly* in front of the cluster.

Royal Observatory astronomer Anna Gammon-Ross adds, “Sometimes the Moon will pass above the Pleiades, sometimes below it, and sometimes… right in front of it.”

Viewers can spot this with the naked eye in the early hours of Sunday morning — a rare and beautiful moment in the sky.