Home > Astronomy, General Astronomy, Globular Clusters, Star & Solar System Formation > ALMA Discovers Proto Super Star Cluster — A Cosmic ‘Dinosaur Egg’ About To Hatch

ALMA Discovers Proto Super Star Cluster — A Cosmic ‘Dinosaur Egg’ About To Hatch


Credit: K. Johnson, U.Va.; ALMA (NRAO/ESO/NAOJ)

Credit: K. Johnson, U.Va.; ALMA (NRAO/ESO/NAOJ)

Globular clusters – dazzling agglomerations of up to a million ancient stars – are among the oldest objects in the universe. Though plentiful in and around many galaxies, newborn examples are vanishingly rare and the conditions necessary to create new ones have never been detected, until now.

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have discovered what may be the first known example of a globular cluster about to be born: an incredibly massive, extremely dense, yet star-free cloud of molecular gas.

“We may be witnessing one of the most ancient and extreme modes of star formation in the universe,” said Kelsey Johnson, an astronomer at the University of Virginia in Charlottesville and lead author on a paper accepted for publication in the Astrophysical Journal. “This remarkable object looks like it was plucked straight out of the very early universe. To discover something that has all the characteristics of a globular cluster, yet has not begun making stars, is like finding a dinosaur egg that’s about to hatch.”

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