Confirming a non-universal X-ray-to-ultraviolet relation with cosmic time is quite surprising and challenges our ...

APM 08279-5255 is a massive black hole (quasar) that contains about 140 trillion times the amount in all of Earth’s oceans ...

Researchers from the University of Arizona have recently discovered the most distant quasar to date. This finding allows researchers to answer how black holes can possibly grow. Quasars contain ...

An international team of astronomers has uncovered subtle but significant signs that the cosmic engines powering quasars, ...

A team of European astronomers has used the European Southern Observatory’s (ESO) Very Large Telescope (VLT) and a host of other telescopes to discover and study the most distant quasar found to date.

The Extended Baryon Oscillation Spectroscopic Survey (eBOSS), the world's largest galaxy survey, is part of Phase IV of the Sloan Digital Sky Survey (SDSS), a major multi-spectral imaging and ...

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IT is often assumed that quasars are partaking in the general expansion of the substratum of an isotropic universe. This hypothesis requires that those quasars possessing any particular observational ...

Astronomers have found the oldest-known X-ray quasar in the universe — and its properties align exactly with predictions for a new class of distant objects made by Yale astronomer Priyamvada Natarajan ...

In a quest to study the variety of stars in our galaxy, the Mauve mission has emerged to provide a stronger understanding of the characteristics of stars—including their magnetic activity, flare ...