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flag The Pleiades star cluster is 20 times larger than thought, with over 3,000 stars spread across hundreds of light-years, new data shows.

flag A new study reveals the Pleiades star cluster is 20 times larger than previously thought, containing over 3,000 stars and forming the dense core of a vast, extended stellar family spanning hundreds of light-years. flag Using data from NASA’s TESS and ESA’s Gaia telescopes, researchers identified true cluster members by analyzing star motions, ages, chemical makeup, and rotation rates—youthful stars spin faster. flag This method uncovered thousands of faint, older stars that drifted apart over time, showing the Pleiades is part of a larger, dynamic stellar association. flag The findings challenge earlier views of the cluster’s boundaries and offer new insights into star formation and galactic structure, with implications for understanding the Sun’s origins.

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