QUASAR

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does quasar mean? 

• QUASAR (noun)
  The noun QUASAR has 1 sense:

1. a starlike object that may send out radio waves and other forms of energy; many have large red shifts

  Familiarity information: QUASAR used as a noun is very rare.

 Dictionary entry details 

• QUASAR (noun)

Sense 1

Meaning:

A starlike object that may send out radio waves and other forms of energy; many have large red shifts

Classified under:

Nouns denoting natural objects (not man-made)

Synonyms:

quasar; quasi-stellar radio source

Hypernyms ("quasar" is a kind of...):

celestial body; heavenly body (natural objects visible in the sky)

 Context examples 

That means the quasar is not only the most distant — it is also the only example we have that can be seen before the universe became reionized.

(Most Distant Black Hole, NASA)

The study surveyed 31 quasars that are seen as they were more than 12.5 billion years ago, at a time when the Universe was still an infant, only about 870 million years old.

(ESO Observations Reveal Black Holes' Breakfast at the Cosmic Dawn, ESO)

They were trying to study star formation in the galaxies that host these quasars.

(Stunning Star Birth in Earliest Galaxies, The Titi Tudorancea Bulletin)

In the quasars Zhou observed, the accretion disks were supplied with fast-falling external mass from surrounding space.

(Astronomers Study How Quasars Are Powered by Accretion Disks, The Titi Tudorancea Bulletin)

The team targeted eight powerful and distant cosmic "streetlights," called quasars (regions around active black holes that emit enormous amounts of light).

(Cosmic Magnifying Glasses Find Dark Matter in Small Clumps, NASA)

Both of these black holes are the central engines of what astronomers call "active galactic nuclei," a class of extremely bright objects that includes quasars and blazars.

(Black Holes Hide in Our Cosmic Backyard, NASA)

This infalling matter emits lots of light, producing a brilliant beacon called a quasar, in the case of the most well-fed black holes.

(Hubble Uncovers Black Hole Disk that Shouldn't Exist, NASA)

The quasar's distance is determined by what's called its redshift, a measurement of how much the wavelength of its light is stretched by the expansion of the universe before reaching Earth.

(Most Distant Black Hole, NASA)

Researchers, for the first time, have observed the accelerated rate at which eight quasars consume interstellar fuel to feed their black holes.

(Astronomers Study How Quasars Are Powered by Accretion Disks, The Titi Tudorancea Bulletin)

The eight quasars and galaxies were aligned so precisely that the warping effect, called gravitational lensing, produced four distorted images of each quasar.

(Cosmic Magnifying Glasses Find Dark Matter in Small Clumps, NASA)