Astronomers Investigate Unusual Stellar Stream

Astronomers using ESA's Gaia satellite and the MMT Observatory have studied the peculiar stellar stream Theia 456, revealing it consists of about 2,100 stars with a total mass of approximately 900 solar masses. The stream, which formed as a low-density open cluster 245 million years ago, is expected to become undetectable in less than 100 million years due to its increasing dispersion.