Rubin Observatory Unveils Detailed View of COSMOS Field

9:07 PM ETDeveloping

Science Desk

In Short: NASA's new Roman Space Telescope has captured the most detailed image of the COSMOS field, a key area for studying dark energy and dark matter.

James Webb Space Telescope Primary Mirror Cryogenic Testing at NASA Marshall (5643074355) — Photo: NASA's James Webb Space Telescope from Greenbelt, MD, USA / Wikimedia Commons (Public domain)

NASA's new Roman Space Telescope has revealed the most detailed view of the COSMOS field, a region of the sky that has been studied for over two decades. According to Phil Marshall, Deputy Director of Rubin Observatory at the SLAC National Accelerator Laboratory, 'The COSMOS field is a very important one for LSST science.

The COSMOS field, a famous patch of the universe, has been observed by astronomers for more than two decades. Now, the Rubin Observatory has captured an image that combines depth, wide-field coverage, and the ability to make repeated observations. This marks the first time the Observatory's Legacy Survey of Space and Time (LSST) Camera, the most powerful digital camera in the world, has produced an image and catalog for scientific research.

The image was released to coincide with Rubin’s Early Data Preview 2 (EDP2), the first phase of Rubin’s Data Preview 2 release. This phase combines observations obtained between April 2005 and January 2026 as part of its science validation period. Astronomers are eager to learn more about dark energy, which makes up about 70 percent of the cosmos and is responsible for the Universe's expansion.

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NASA announced in 2020 that the next great observatory, up until then known as the Wide Field Infrared Survey Telescope (WFIRST), would be named in honor of Roman.
“Roman’s large field of view and fast survey speeds will reveal untold cosmic objects while shining a light on dark energy and dark matter,” Fox said.
The new mission will extend the vision of NASA’s other famous observatories, providing a field of view 100 times wider than the Hubble Space Telescope and complementing the groundbreaking work of the James Webb Space Telescope.
The rocket sent the observatory toward an observation post around the Sun-Earth L2 Lagrange point, a gravitational balance point nearly a million miles (1.5 million kilometers) from Earth.
Ground teams will activate and calibrate the observatory during the transit, and scientists aim to have the first science images ready for publication by the end of the year.
Rubin Observatory looked in and around this field not long ago and captured the most detailed view to date of the hundreds of thousands of galaxies, stars, and celestial environments therein.
As Blum added: As we celebrate the start of science with Rubin Observatory, our thoughts are with our staff and the community of Chile impacted by the recent devastating storms in the region of Coquimbo and beyond.
Rubin's sensitivity and high resolution are already giving astronomers a powerful new view of this famous cosmic landmark.

Sources

Ars Technicalink