U-M Astronomers Discover 87 New Stellar Streams in Milky Way

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Researchers at the University of Michigan have developed a new algorithm that has helped discover 87 new potential stellar streams in the Milky Way galaxy. Stellar streams are trails of stars that astronomers can study to learn more about the history and evolution of our galaxy, as well as the mysterious dark matter that shapes the cosmos.

Why it matters

Stellar streams are important astrophysical objects that can provide valuable insights into the Milky Way's formation and the distribution of dark matter. Prior to this discovery, only 18 such stellar streams were known, so this significant increase in the number of identified streams will greatly expand the data available for studying galaxy evolution.

The details

The new algorithm developed by the University of Michigan researchers was able to identify 87 new potential stellar streams, a major increase from the 18 that were previously known. Stellar streams are formed when globular clusters or dwarf galaxies are torn apart by the Milky Way's gravity, leaving behind trails of stars. Analyzing the properties of these stellar streams can reveal clues about the galaxy's history and the distribution of dark matter.

• The research was published on March 24, 2026.

What’s next

The researchers plan to further study the newly discovered stellar streams to learn more about the Milky Way's evolution and the role of dark matter.