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"Star cluster formation simulations were challenging because of the simulation cost," Fujii says.

But there are other stories about suddenly disappearing stars, such as the Greek myth associated with the Pleiades star cluster, commonly known as the Seven Sisters.

"Every single white dot in this image is either a star or a star cluster. We can start to distinguish all of these tiny point sources, which enables us to acquire an accurate count of all the star clusters in this galaxy."

On July 30, the crescent moon will float among shining Jupiter, red Mars, the bright star Aldebaran and the pretty Pleiades star cluster before sunrise.

Mars will buzz the Beehive star cluster on Dec. 5.