Space Stories: The Disappearance of Dark Skies in Chile, Subaru Telescope Gets New Eye, and Roman Telescope Previews

Posted on by onespaceman2000
Image (Credit): The four large Unit Telescopes and the four smaller Auxiliary Telescopes that make up the European Southern Observatory’s (USO) Very Large Telescope. (USO)

Here are some recent stories related to astronomy telescopes.

—Sky & Telescope: “Industrial Project Threatens Dark Chilean Skies“

When a study in 2023 crowned Cerro Paranal the darkest observatory site in the world, astronomers must have felt reassured to have chosen the right spot. The 2,635-meter (8,645-foot) mountain in Chile’s Atacama Desert is home to the European Southern Observatory’s (ESO) Very Large Telescope, one of the most advanced and prolific astronomical facilities. But now, if a company named AES Andes (a subsidiary of the U.S. power company AES Corporation) gets its way, Paranal’s observational prowess might soon be history: Light pollution emitted by a proposed industrial “megaproject” could do away with the dark skies over this observatory.

—National Astronomical Observatory of Japan: “Prime Focus Spectrograph on the Subaru Telescope to Begin Science Operations in February“

Researchers have finished equipping the Subaru Telescope with a new special “compound eye,” culminating several years of effort. This new eye is an instrument featuring approximately 2,400 prisms scattered across the extremely wide field of view available at the Subaru Telescope’s primary focus, allowing for simultaneous spectroscopic observation of thousands of celestial objects. This unrivaled capability will help researchers precisely understand the formation and evolution of galaxies and the Universe. Among 8-meter-class telescopes, the Subaru Telescope is the most competitive with the largest survey capability in the world. This instrument, the Prime Focus Spectrograph (PFS), will be ready to begin scientific operations in February 2025.

—NASA: “Simulated Universe Previews Panoramas from NASA’s Roman Telescope“

Astronomers have released a set of more than a million simulated images showcasing the cosmos as NASA’s upcoming Nancy Grace Roman Space Telescope will see it. This preview will help scientists explore Roman’s myriad science goals. “We used a supercomputer to create a synthetic universe and simulated billions of years of evolution, tracing every photon’s path all the way from each cosmic object to Roman’s detectors,” said Michael Troxel, an associate professor of physics at Duke University in Durham, North Carolina, who led the simulation campaign. “This is the largest, deepest, most realistic synthetic survey of a mock universe available today.”