NuSTAR Observations of a Varying-flux Quasar in the Epoch of Reionization. The Astrophysical Journal Letters , 2025; 979 (1): L6 DOI: 10.3847/2041-8213/ad94ee Cite This Page : ...

Astronomers have discovered the brightest object ever observed in the universe. Astronomers discovered a quasar, which is the "brightest of its kind" and the "most luminous object ever observed ...

The universe’s brightest object is a quasar in a distant galaxy that’s powered by the fastest-growing black hole ever recorded, according to a new study. CNN values your feedback 1.

Beyond its significance as the oldest-known X-ray quasar, UHZ1 offers compelling proof that the early universe is “seeded” with heavy black hole seeds with large birth masses that likely formed from ...

Picture a black hole so powerful that it swallows the equivalent of one sun every day.. Now imagine that black hole also has a mass that's 17 billion times larger than our sun. Scientists in ...

A quasar that close could have caused a lull in star formation that astronomers might someday detect by measuring precise ages for our galaxy’s oldest stars (SN: 3/23/22).

In a breakthrough discovery, scientists have found the most distant quasar yet known — and it's home to a seriously supermassive black hole.

Astronomers witnessed two galaxies engaged in an intense deep-space battle for the first time. Watch the “cosmic joust” in action.

Scientists have discovered a rare arrangement of four quasars within 700,000 light-years of each other. Finding one quasar is rare, but newfound quasar quartet is the first of its kind.

The quasar 3C 273 appears starlike in this optical image taken by the Hubble Space Telescope. In reality, the light comes from the accretion disk around a supermassive black hole.

For the study, the researchers compared NuSTAR observations of a distant quasar — designated J1429 +5447 — with unrelated observations of four months earlier by the Chandra X-ray telescope. The ...