A quasar (/ ˈ k w eɪ z ɑːr / KWAY-zar) is an extremely luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO. The emission from an AGN is …

Oct 19, 2023 · Quasars are the remarkably bright cores of active galaxies in the distant universe, they are an extreme form of what astronomers call "active galactic nuclei", or AGN for...

Oct 9, 2024 · A Hubble Space Telescope photograph of a pair of quasars that existed when the universe was just 3 billion years old. They are embedded inside a pair of colliding galaxies. …

Mar 19, 2025 · Quasar, an astronomical object of very high luminosity found in the centres of some galaxies and powered by gas spiraling at high velocity into an extremely large black …

Artist's conception of the oldest known quasar as of 2021, QSO J0313–1806 existing only ~670 million years after the Big Bang despite its large size. In 1964 a quasar became the most …

Aug 19, 2020 · Scientists plan to use Webb to study the impact of three carefully selected quasars on their host galaxies in a program called Q3D. Astronomers widely believe that the energy …

1 day ago · NASA’s Hubble Space Telescope has unveiled a strikingly detailed view of one of the universe’s most iconic and powerful objects — the quasar 3C 273.This new glimpse into the …

Dec 5, 2024 · Astronomers have used the unique capabilities of NASA's Hubble Space Telescope to peer closer than ever into the throat of an energetic monster black hole powering a quasar. …

Feb 19, 2024 · Astronomers have discovered a quasar that remained hidden for over the years is the brightest ever, powered by the fastest growing black hole ever discovered that eats a sun …

Jun 23, 2021 · Quasars are very bright, distant and active supermassive black holes that are millions to billions of times the mass of the Sun. Typically located at the centers of galaxies, …