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Rubin Observatory Goes Live With Real-Time Sky Alerts, Sending 800,000 in First Night

A University of Washington–built pipeline delivers minute‑scale notices to community brokers ahead of the LSST start later this year.

Six-Planet Parade to Peak on Feb. 28, but Only Some Will Be Visible Without Optics

Gemini South Marks 25 Years With New Butterfly Nebula Image

Comet Lemmon Brightens Ahead of Oct. 20–21 Peak, Now Near the Big Dipper

Twin Green Comets Enter Prime Viewing Week Before Closest Approaches

Rubin Observatory Unveils First Deep-Sky Survey Images, Activates Rapid Alert System