Westerlund 1 is the biggest star cluster in our galaxy.
Sandeep K S
Dec 11, 2025
1 min read
Illustration depicting the discovery of a cosmic particle outflow from Westerlund 1, featuring a TeV ring detected by the H.E.S.S. telescope and a GeV gamma-ray signal located by the Fermi telescope. An unexplained "tail" connects these phenomena, illustrating high-energy electrons creating a nascent outflow.
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