Reference Terms

from Wikipedia, the free encyclopedia

Quasar

A quasar is an astronomical source of electromagnetic energy, including light, which shows a very high redshift.

Note: The above text is excerpted from the Wikipedia article "Quasar", which has been released under the GNU Free Documentation License.

For more information, see the following related content on ScienceDaily:

1

2

International Team Observes Innermost Structure of Quasar Jet

Nov. 22, 2022 — Scientists have observed the narrowing of a quasar jet for the first time by using a network of radio telescopes across the world. The results suggest that the narrowing of the jet is independent of ...

An X-Ray Look at the Heart of Powerful Quasars

May 19, 2023 — Researchers have observed the X-ray emission of the most luminous quasar seen in the last 9 billion years of cosmic history, known as SMSS J114447.77-430859.3, or J1144 for short. The new perspective ...

Most Distant Quasar With Powerful Radio Jets Discovered

Mar. 8, 2021 — Astronomers have discovered and studied in detail the most distant source of radio emission known to date. The source is a 'radio-loud' quasar -- a bright object with powerful jets emitting ...

Finding Quasars: Rare Extragalactic Objects Are Now Easier to Spot

June 8, 2021 — Astrophysicists have developed a new method for pinpointing the whereabouts of extremely rare extragalactic objects. They hope their technique for finding 'changing-look quasars' will take ...

Quasar Discovery Sets New Distance Record

Jan. 12, 2021 — Astronomers have discovered the most distant quasar yet found. The bright quasar, powered by a supermassive black hole at the core of a galaxy, is seen as it was only 670 million years after the Big ...

Weigh a Quasar's Galaxy With Precision

June 3, 2023 — Scientists have managed to weigh -- more precisely than any other technique -- a galaxy hosting a quasar, thanks to the fact that it acts as a gravitational lens. Detection of strong gravitational ...

Potential First Traces of the Universe's Earliest Stars

Sep. 29, 2022 — Astronomers may have discovered the ancient chemical remains of the first stars to light up the Universe. Using an innovative analysis of a distant quasar observed by the 8.1-meter Gemini North ...

Hidden Supermassive Black Holes Reveal Their Secrets Through Radio Signals

Sep. 25, 2023 — Astronomers have found a striking link between the amount of dust surrounding a supermassive black hole and the strength of the radio emission produced in extremely bright ...

Hubble Unexpectedly Finds Double Quasar in Distant Universe

Apr. 5, 2023 — The early universe was a rambunctious place where galaxies often bumped into each other and even merged together. Using NASA's Hubble Space Telescope and other space and ground-based ...

Hubble Sheds Light on Origins of Supermassive Black Holes

Apr. 13, 2022 — Astronomers have identified a rapidly growing black hole in the early universe that is considered a crucial 'missing link' between young star-forming galaxies and the first supermassive ...

Space & Time News

December 8, 2023

Ancient Stars Made Extraordinarily Heavy Elements

Dec. 7, 2023 — How heavy can an element be? An international team of researchers has found that ancient stars were capable of producing elements with atomic masses greater than 260, heavier than any element on the periodic table found naturally on Earth. The ...

An Astronomical Waltz Reveals a Sextuplet of Planets

Nov. 29, 2023 — Astronomers have found a key new system of six transiting planets orbiting a bright star in a harmonic rhythm. This rare property enabled the team to determine the planetary orbits which initially appeared as an unsolvable ...

Astronomers Discover Disc Around Star in Another Galaxy

Nov. 29, 2023 — In a remarkable discovery, astronomers have found a disc around a young star in the Large Magellanic Cloud, a galaxy neighboring ours. It's the first time such a disc, identical to those forming planets in our own Milky Way, has ever been found ...

Telescope Array Detects Second Highest-Energy Cosmic Ray Ever

Nov. 23, 2023 — In 1991, an experiment detected the highest-energy cosmic ray ever observed. Later dubbed the Oh-My-God particle, the cosmic ray’s energy shocked astrophysicists. Nothing in our galaxy had the power to produce it, and the particle had more energy ...

Latest Headlines

updated 12:56 pm ET

Scholars Say It's Time to Declare a New Epoch on the Moon, the 'Lunar Anthropocene'

Dec. 8, 2023 — According to anthropologists and geologists, it's time to acknowledge humans have become the dominant force shaping the moon's environment by ...

Giant Doubts About Giant Exomoons

Dec. 7, 2023 — The extrasolar planets Kepler-1625b and Kepler-1708b are supposedly the home worlds of the first known exomoons. A new study now comes to a different ...

Stellar Winds Regulate Growth of Galaxies

Dec. 6, 2023 — Galactic winds enable the exchange of matter between galaxies and their surroundings. In this way, they limit the growth of galaxies, that is, their star formation rate. Although this had already ...

Interpreting the Afterglow of a Black Hole's Breakfast

Dec. 4, 2023 — An entirely new way to probe how active black holes behave when they eat has been discovered by an international team of ...

Limitations of Asteroid Crater Lakes as Climate Archives

Dec. 5, 2023 — In southern Germany just north of the Danube, there lies a large circular depression between the hilly surroundings: the Nördlinger Ries. Almost 15 million years ago, an asteroid struck this spot. ...

Unlocking Neutron Star Rotation Anomalies: Insights from Quantum Simulation

Dec. 5, 2023 — A collaboration between quantum physicists and astrophysicists has achieved a significant breakthrough in understanding neutron star glitches. They were able to numerically simulate this enigmatic ...

Astronomers Determine the Age of Three Mysterious Baby Stars at the Heart of the Milky Way

Dec. 5, 2023 — Through analysis of high-resolution data from a ten-meter telescope in Hawaii, researchers have succeeded in generating new knowledge about three ...

Can Signs of Life Be Detected from Saturn's Frigid Moon?

Dec. 5, 2023 — Researchers have shown unambiguous laboratory evidence that amino acids transported in the ice plumes of Saturn's moon, Eceladus, can survive impact speeds of up to 4.2 km/s, supporting their ...

Tracking Undetectable Space Junk

Dec. 4, 2023 — Satellite and spacecraft operators may finally be able to detect small pieces of debris orbiting Earth using a new approach. Colliding pieces of space debris emit electric signals that could help ...

Ghostlike Dusty Galaxy Reappears in James Webb Space Telescope Image

Dec. 1, 2023 — Astronomers studying images from the James Webb Space Telescope have identified an object as a 'dusty star-forming galaxy' from nearly 1 billion years after the Big Bang. They have also discovered ...