Astronomers Discover Young Stars in Old Part of the Milky Way

Saturday, January 11, 2020 - 16:10

Astronomers have found a cluster of young stars in the Milky Way where it seemingly shouldn’t exist.

According to the Science News report, researchers reported during a news conference at a meeting of the American Astronomical Society on January 7, 2020 that a flock of relatively new stars is hurtling through the halo in the Milky Way.

Based on the report, the star cluster is about 120 million years old and sits about 94,000 light-years away from Earth. Astronomers found it by sifting through data from the European Space Agency’s Gaia satellite for young stars clumped together and moving in the same direction across the sky.

The cluster appears to be speeding ahead of a stream of gas being torn from those galaxies by the Milky Way’s gravity, suggesting that perhaps new stars are popping out of shredded remains of these satellites.

If the cluster and the stream are connected, they reveal unknown conditions in the halo, said David Nidever of Montana State University in Bozeman at the same news conference.

The stars appear to plow ahead, while gas in the halo drags on the stream, slowing it down. Taking into account the star cluster’s age and its 17,000-light-year distance from the leading edge of the stream, Nidever said that gas in the halo may be 10 times as dense as previously thought.


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