In 2026 the NSF and DOE Vera C. Rubin Observatory started its Legacy Survey of Space and Time, using the largest digital camera ever built to scan the southern sky for a decade. A look at the numbers behind one of astronomy's most ambitious projects.
Astronomy has entered a new era in 2026 with the start of one of the most ambitious sky surveys ever attempted. High on a mountaintop, a new observatory has begun the slow and steady work of watching the entire southern sky, night after night, for a full decade.
The project promises to reshape how scientists study the cosmos, not by looking at a single object in great detail, but by mapping almost everything visible in the sky again and again. The result will be less a photograph and more a vast, moving record of the universe.
A New Kind of Observatory
According to reports, the facility behind this effort is the NSF and DOE Vera C. Rubin Observatory, located on a mountaintop in Chile. At its heart sits the 8.4 meter Simonyi Survey Telescope, a wide field instrument designed to capture enormous swaths of sky at once.
The observatory is named after Vera Rubin, the American astronomer whose work provided key evidence for the existence of dark matter. That legacy is fitting, since one of the survey's central goals is to shed new light on the invisible components of the universe.
The Largest Digital Camera Ever Built
The telescope's most striking feature is its camera. According to reports, the LSST Camera carries a resolution of about 3,200 megapixels and is described as the largest digital camera in the world, capable of recording extraordinarily detailed views of the sky in a single shot.
That power comes with an enormous flow of information. According to reports, the observatory captures a new image roughly every 40 seconds, takes around 1,000 images per night, and generates on the order of 10 terabytes of data each and every night of observing.
A Ten Year Movie of the Sky
The centerpiece of the project is the Legacy Survey of Space and Time, a ten year effort that reports say officially began on June 30, 2026. Rather than staring at one spot, the telescope sweeps across the sky, returning to each patch roughly 800 times over the decade.
By imaging the same regions over and over, the survey can detect anything that moves or changes brightness. This turns the collection of images into a kind of time lapse movie, revealing events that a single snapshot could never capture on its own.
Billions of Galaxies to Map

The scale of what the survey will record is hard to grasp. According to reports, the observatory is expected to image on the order of five billion galaxies, building a catalog of the distant universe that is far larger than anything assembled before it.
A first data preview has already offered a taste of what is to come. According to reports, an early release centered on the well studied COSMOS field revealed hundreds of thousands of galaxies, drawn from observations gathered between April 2025 and January 2026.
Millions of Alerts Every Night
Because the survey watches for change, it also acts as an early warning system for the cosmos. According to reports, the observatory can issue up to 7 million alerts of sky changes each night, flagging events such as exploding stars and objects that suddenly brighten or fade.
A Census of the Solar System
The survey is not only about distant galaxies. According to reports, during an early optimization phase the observatory discovered more than 11,000 asteroids in about a month and a half, including 33 near Earth objects and 380 more distant bodies beyond Neptune.
Dark Matter and Dark Energy
Beyond cataloging objects, the survey aims to tackle some of the deepest questions in physics. Scientists hope the vast dataset will help them probe dark matter and dark energy, the mysterious ingredients thought to make up most of the universe yet still poorly understood.
What Comes Next
With the survey now underway, the coming years will bring a steady stream of data to researchers around the world. For astronomers, the Vera Rubin Observatory represents a decade long opportunity to watch the universe unfold in motion, one night at a time.
LSST: covered better than most.
Good context around LSST.
True.
Spot on.

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