World’s largest telescope to capture its first images on this date – Here’s how to watch

Using the largest camera ever built, Rubin will repeatedly scan the sky for 10 years and create an ultra-wide, ultra-high-definition time-lapse record of our universe. (Image: Rubin Observatory)

For skywatchers and stargazers, a new chapter begins soon. After two decades of planning and preparation, the Vera C. Rubin Observatory in Chile is ready to reveal its first celestial snapshots.

An Eye on the Southern Sky

The observatory houses the world’s most powerful survey telescope. It also boasts the largest digital camera ever built by humans. On June 23, 2025, the US National Science Foundation and Department of Energy will unveil the telescope’s first observations. Scientists believe this marks a turning point in astronomy and space discovery.

Originally proposed in 2001, Rubin Observatory has taken 20 years to complete. Over the next 10 years, it will carry out the Legacy Survey of Space and Time (LSST). It will scan the southern sky in near-ultraviolet, optical and near-infrared wavelengths. Each patch of sky will be photographed around 800 times using a massive 3,200-megapixel camera.

A Telescope Like No Other

The telescope will generate 20 terabytes of data every 24 hours. By the end of the survey, nearly 60 petabytes of raw images will be collected. That’s almost twice as much data as the Murchison Widefield Array collected during a similar period.

Experts say the observatory can do what no other telescope has done before. It will spot faint and distant objects while also catching real-time changes in the sky. According to the NSF and DOE, Rubin’s speed, wide field of view and sensitive camera push the limits of what telescopes can achieve.

Astronomers believe the telescope may spot rare and unknown space events. These sightings could answer long-standing questions and raise new ones we haven’t even thought of yet.

Watch Party for the Cosmos

The release of Rubin's first images is expected to be a major moment in astronomy. Enthusiasts are planning watch parties worldwide. The first look will be shared at 11:00 ET, or 8:30 pm IST, on June 23. The images will also be broadcast on YouTube via the Rubin Observatory channel.

With a decade of discovery ahead, scientists are eager to see what secrets Rubin will reveal. The night sky is about to get a lot more exciting.