Astronomers are raising concerns about the impact of light pollution from a renewable energy project on the world’s most ...

Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...

In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...

Active galactic nuclei (AGN) are among the most energetic phenomena observed in the universe. These luminous objects, powered ...

In 2018, a galaxy about 270 million light-years away from Earth exhibited a major increase in activity. It quieted down again by 2020 -- only to dramatically increase its output again in 2023. At that ...

Lee Feinberg, HWO's principal architect based at Goddard, said in a separate presentation that NASA is currently envisioning ...

How do images taken by the James Webb Space Telescope (JWST) appear so colorful, and where do the colors come from?

Astronomers have released a set of more than a million simulated images showcasing the cosmos as NASA’s upcoming Nancy Grace ...

The ESA Solar Orbiter has provided a stunning new look at the Sun by combining 25 high-resolution images. This mosaic offers a detailed view of the solar surface, including sunspots and granules, ...

NASA's Roman Space Telescope, slated for a 2027 launch, will provide insights into dark energy and exoplanets. It will ...

International teams of astronomers monitoring a supermassive black hole in the heart of a distant galaxy have detected ...

Galaxy clusters are home to many giant elliptical galaxies that have completed their growth and are not forming stars.