LA SERENA, Chile, July 16 — The Vera C. Rubin Observatory has been scanning the southern sky every 40 seconds since July 2026, when full survey operations began. The observatory, perched on the El Peñón peak of Cerro Pachón in northern Chile, is now producing a 3.2-gigapixel image of the night sky at that cadence, every night, for the next ten years.
The technical reality under the hood is as precise as it is ambitious. The Simonyi Survey Telescope uses an 8.4-meter primary mirror in a three-mirror anastigmat configuration, delivering sharp images across a 3.5-degree-diameter field of view.
That wide field is recorded by the largest charge-coupled device imaging camera ever built — the 3.2-gigapixel camera. The observatory saw first light in June 2025. The scale of the data haul is difficult to overstate.
Over its ten-year survey, the observatory is expected to catalogue millions of supernovae, more than five million asteroids (including roughly 100,000 near-Earth objects), and image approximately 17 billion stars and 20 billion galaxies.
From LSST to Rubin: A Renaming with Bipartisan Roots
The observatory was originally named the Large Synoptic Survey Telescope, where “synoptic” described its ability to give a broad, sweeping view of the sky. In June 2019, U.S. Representative Eddie Bernice Johnson and Resident Commissioner of Puerto Rico Jenniffer González-Colón proposed renaming the observatory after Vera Rubin, the American astronomer whose work on galactic rotation rates provided early evidence for dark matter. The renaming was enacted as U.S. law on 20 December 2019, and announced at the 2020 American Astronomical Society winter meeting.
The telescope itself carries the name Simonyi Survey Telescope.
The Satellite Streak Problem
The detail that matters for the observatory’s data quality is its vulnerability to satellite streaks. The wide field of view and rapid scanning cadence — an image every 40 seconds — make the Rubin Observatory especially susceptible to streaks from the growing constellation of low-Earth-orbit satellites. Those streaks can corrupt images, and at a 40-second cadence, there is little time to dodge them.
The observatory is located on Cerro Pachón at 2,682 metres, alongside the existing Gemini South and Southern Astrophysical Research Telescopes. The base facility is about 100 kilometres away by road, in La Serena.
That remote location in northern Chile’s Coquimbo Region was chosen for its dark skies, but the dark skies are now contested by orbital debris and satellite constellations. With full survey operations now running, the next decade will determine whether the Rubin Observatory delivers on its promise to map the visible universe at an unprecedented scale — or whether the satellite problem forces engineers to develop new mitigation strategies on the fly. The camera is the largest ever built.
The cadence is relentless. The sky, as ever, is not as empty as it used to be.
