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An international team of astronomers has used the Atacama Large Millimeter/submillimeter Array (ALMA) to observe a well-known quasar known as the Cloverleaf. As part of the observations, they ...

When did the universe start? When and how did the first stars and galaxies form? What is the fate of the universe? The standard cosmological model, also known as the LCDM model, can answer most of ...

Quasars acting as strong gravitational lenses are among the rarest finds in astronomy. Out of nearly 300,000 quasars cataloged in the Sloan Digital Sky Survey, only twelve candidates were identified, ...

In astronomy, there is a term called the "active galactic nucleus," which refers to the fact that some of the black holes that are strongly theorized to lie at the center of all galaxies are sending ...

Astronomers searching the deep sky with the European Space Agency’s (ESA) Euclid space telescope have turned up the oldest quasars ever recorded — bright galactic cores that came to life when the ...

This artist's concept depicts a distant galaxy with an active quasar at its center. The "quasar winds" are propelling hundreds of solar masses of material outward into the galaxy disk each year. This ...