In 1963, Caltech researcher Maarten Schmidt had a eureka moment. He was looking at the spectrum of a mysterious object named 3C 273, a source that had been found and cataloged with then-novel radio ...

An international team of astronomers reports the discovery of a new dusty star-forming galaxy at high redshift. The newfound ...

GREENBELT, Md. — An ongoing X-ray survey undertaken by NASA’s Swift spacecraft is revealing differences between nearby active galaxies and those located about halfway across the universe.

Tracking down black holes at the center of dwarf galaxies has proven difficult. In part it is because they have a tendency to ...

An international team of astronomers has used the world’s biggest radio telescope to look deep into the brightest galaxies that NASA’s Fermi Gamma-ray Space Telescope can see. The study solidifies the ...

Some black holes, bound by gravity, rotate around each other, as shown in this simulated image. Simulating eXtreme Spacetimes Lensing (SXS), CC BY-SA Black holes are regions of space where gravity is ...

After starting science operations in February, Japan-led XRISM (X-ray Imaging and Spectroscopy Mission) studied the monster black hole at the center of galaxy NGC 4151. After starting science ...

Supermassive black holes at the hearts of active galaxies may be churning out a lot of the universe’s high-energy neutrinos. “I would say that they can be the major contributor,” says astronomer ...

“There’s a lot we don’t know about the workings of supermassive black holes,” says Richard Mushotzky of NASA’s Goddard Space Flight Center in Greenbelt, Md. Astronomers think the intense emission from ...