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    Vera C. Rubin Observatory

    Also known as Rubin Observatory, LSST, Legacy Survey of Space and Time, Simonyi Survey Telescope

    The NSF-DOE Vera C. Rubin Observatory is a survey telescope on Cerro Pachón in Chile with an 8.4-meter mirror and the largest digital camera ever built.[1] Its 10-year Legacy Survey of Space and Time (LSST) was announced as officially started on June 30, 2026, and it sends out up to seven million alerts a night about objects that change or move in the sky.[2][3]

    Editor reviewedUpdated Space exploration and astronomySpaceScience
    Key facts

    What it is

    Rubin Observatory is a new astronomy facility on Cerro Pachón in Chile, funded by the US National Science Foundation and the Department of Energy’s Office of Science and operated by NSF NOIRLab and SLAC.[1] Its 8.4-meter Simonyi Survey Telescope carries the LSST Camera, the largest digital camera ever built, at 3,200 megapixels.[1][4] The observatory is named after Vera Rubin, the astronomer whose work provided strong early evidence for dark matter.[1]

    The ten-year movie

    Rubin is built to be fast rather than to stare. It takes a new image roughly every 40 seconds and will observe the whole southern sky every few nights, returning to each point about 800 times over a decade.[3] NSF NOIRLab announced on June 30, 2026 that the 10-year Legacy Survey of Space and Time had officially started. The announcement followed the First Look event in June 2025, final commissioning and an operational readiness review.[2] Rubin Observatory’s own website dates the start of the survey to July 2026. This page uses the June 30 announcement date and notes the difference.[2]

    The go-ahead depended on measured performance. Image quality, effective survey speed, system uptime and reliability, and calibration accuracy were the factors in the decision.[5]

    Alerts and data

    Each night Rubin collects about 10 terabytes of data and produces up to seven million alerts of changes in the sky. The alerts stream to automated “alert brokers” that sort and classify them for follow-up.[3] Astronomers had already used the public alerts to discover and follow up hundreds of transient events before the full survey began. The final dataset is expected to hold billions of objects and to be released openly in regular data releases.[3] NOIRLab describes this as the first time so much astronomical data will be open to so many people, scientists and public alike, and Rubin’s director Bob Blum has said the survey will let researchers anywhere take part.[6]

    Rubin’s colour images of fast-changing events, such as stellar explosions and collisions between compact objects, are meant to steer other telescopes. This is multi-messenger astronomy, which combines light with signals such as the gravitational waves recorded by LIGO, Virgo and KAGRA.[7]

    Early results

    Rubin is also a solar-system discovery machine. It takes about a thousand images a night and is expected to catalogue millions of asteroids and comets.[4] In about a month and a half of early optimization surveys it found more than 11,000 previously unknown asteroids, including 33 near-Earth objects and 380 objects beyond Neptune.[8] One is the fastest-spinning asteroid larger than 500 metres ever found.[9]

    Why it matters

    Rubin, Roman and Webb are complementary. Rubin finds things that change, Roman surveys wide areas in the infrared from space, and Webb follows up individual objects in depth.[3][10][11] Rubin’s scientific goals include dark energy and dark matter, the same questions Roman targets.[1][10] The galaxy-mapping survey DESI is attacking the same question, and its data so far hint that dark energy may change over time.[12] The physics is explained in dark matter and dark energy explained. See also how space telescopes work.

    Questions readers ask

    What is the LSST?

    The Legacy Survey of Space and Time is Rubin's 10-year survey of the southern sky, revisiting each point about 800 times. NOIRLab announced its official start on June 30, 2026.[2][3]

    Did the survey start in June or July 2026?

    NOIRLab, which runs Rubin with SLAC, announced the start on June 30, 2026. Rubin's own website says the survey began in July 2026. The two dates are within about a day of each other.[2]

    How many asteroids has Rubin found?

    In about a month and a half of early optimization surveys it found more than 11,000 new asteroids, including 33 near-Earth objects.[8]

    Who runs Rubin Observatory?

    It is funded by the US National Science Foundation and Department of Energy and operated by NSF NOIRLab and SLAC.[1]

    Sources

    Each numbered claim is a statement we checked against the sources listed with it. Status shows how well established it is.

    1. [1]

      The NSF-DOE Vera C. Rubin Observatory on Cerro Pachón in Chile, named after the astronomer Vera Rubin and aimed at questions including dark energy and dark matter, uses the 8.4-meter Simonyi Survey Telescope and the LSST Camera, the largest digital camera ever built, and is operated by NSF NOIRLab and SLAC. confirmedas of 2026-10-10

    2. [2]

      NSF NOIRLab, which operates Rubin with SLAC, announced on June 30, 2026 that the 10-year Legacy Survey of Space and Time had officially started after a period of system optimization and an operational readiness review; Rubin Observatory's own website dates the start of the survey to July 2026. confirmedas of 2026-10-10

    3. [3]

      Rubin takes an image about every 40 seconds, collects about 10 terabytes of data a night, produces up to seven million alerts a night that stream to automated alert brokers, will revisit each point in the sky about 800 times over the decade, and will release its billions of catalogued objects openly; its public alerts had already led to hundreds of transient discoveries before the survey began. confirmedas of 2026-06-30

    4. [4]

      Rubin's 3,200-megapixel camera takes about a thousand images a night, which NOIRLab says makes it the most powerful Solar System discovery machine ever built, compiling a census expected to include millions of asteroids and comets. confirmedas of 2026-06-30

    5. [5]

      Factors in the decision to start Rubin's survey included image quality, effective survey speed, system uptime and reliability, and calibration accuracy. confirmedas of 2026-06-30

    6. [6]

      Rubin's director at NOIRLab, Bob Blum, said the LSST would let researchers anywhere take part in cutting-edge science, and NOIRLab says it is the first time so much astronomical data will be available to so many people, including the public. confirmedas of 2026-06-30

    7. [7]

      Rubin's rapid colour observations of transients, such as stellar explosions and collisions between compact objects, are intended to guide follow-up for multi-messenger astronomy, which combines light with signals such as gravitational waves and cosmic rays. confirmedas of 2026-06-30

    8. [8]

      In a month and a half of early optimization surveys, Rubin discovered more than 11,000 new asteroids, including 33 near-Earth objects. confirmedas of 2026-06-30

    9. [9]

      One asteroid Rubin found during early optimization surveys is the fastest-spinning asteroid larger than 500 metres ever found, located in the main asteroid belt. confirmedas of 2026-06-30

    10. [10]

      Roman has a field of view at least 100 times larger than Hubble's, carries a Wide Field Instrument and a Coronagraph, and is designed to address dark energy, exoplanets and infrared astrophysics. confirmedas of 2026-10-10

    11. [11]

      NASA groups Webb's science into four themes, the early universe, galaxies over time, the life cycle of stars, and other worlds, including measuring what exoplanet atmospheres are made of. confirmedas of 2026-10-10

    12. [12]

      On 19 March 2025 DESI released baryon acoustic oscillation results from three years of data covering about 14 to 15 million galaxies and quasars; combined with other data they preferred evolving dark energy over a cosmological constant at 2.8 to 4.2 sigma, short of the 5-sigma discovery standard. confirmedas of 2025-03-19

    Revision history (2)
    1. Page created.
    2. Resolved the survey start date (NOIRLab announcement June 30 vs Rubin's "July 2026"); added readiness criteria, camera cadence, multi-messenger role and links to DESI and LIGO-Virgo-KAGRA.

    Created Oct 10, 2026. Last reviewed by an editor on Oct 10, 2026. Next scheduled review: Jan 10, 2027.

    Cite this page

    "Vera C. Rubin Observatory." ContentLora, updated Oct 10, 2026. https://contentlora.com/wiki/vera-c-rubin-observatory

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