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Quasar

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A stunning view of a distant quasar captured by the Hubble Space Telescope, showing the bright heart of this energetic object in space.

Quasars

Quasars are very bright objects far away in space. They are some of the brightest things we know! Even though they look small and faint to us, they shine much brighter than whole galaxies.

Quasars are found in the centers of galaxies. Scientists believe they get their energy from huge black holes. As material falls toward these black holes, it heats up and gives off lots of light. This makes quasars very bright.

The word quasar means “star-like radio source.” Long ago, people thought they looked like stars but gave out strong radio waves. Today, we know they are much bigger and farther away.

Quasars help scientists learn about the early universe. Because they are so far away, their light shows us how things looked long ago. By studying quasars, we can learn about how galaxies and black holes grow and change.

Some quasars change their brightness quickly. This tells us that their energy comes from a very small area, which helps us understand black holes better.

Quasars were more common when the universe was younger. As black holes used up material around them, many quasars faded away. But scientists keep finding new ones, helping us learn more about space and time.

Images

An artist’s illustration of ULAS J1120+0641, one of the brightest and most distant objects known in the early universe, powered by a giant black hole.
Astronomical image showing bright quasars in merging galaxies, captured by the Hubble Space Telescope.
Astronomers discovered bright gaseous halos surrounding distant quasars, captured by a powerful telescope.
A stunning image of a distant quasar being bent by gravity from a foreground galaxy, helping scientists study faraway objects in space.
A scientific spectrum showing light from a distant star-like object, with lines indicating how space gases affect the light.
A stunning image of a distant quasar, showcasing the powerful energy of objects in deep space.
Astronomical image showing two pairs of quasars—bright objects at the centers of distant galaxies—as observed by the Hubble Space Telescope.
An image from the James Webb Space Telescope showing a thread-like arrangement of early galaxies forming part of the cosmic web, with a bright quasar anchoring the structure.
Astronomers use special telescopes to study distant objects called quasars. This image shows how light from one of these objects stretches into different colors, helping us learn about the early universe.
A stunning image of the distant quasar HE0450-2958 captured by the Hubble Space Telescope, showcasing the beauty of deep space.
A stunning view of the Quasar HE 1013-2136 showing its long, stretching tails of stars and gas, captured by a powerful telescope.
An image of a powerful X-ray jet stretching a million light years from a distant quasar, showing how energy travels through space.
A stunning image of the quasar 3C273 captured by the Sloan Digital Sky Survey, showing a bright object in deep space.
A stunning space image showing a galaxy acting like a cosmic lens, creating a cross-shaped pattern of light from a distant starbursting quasar billions of light-years away.

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This article is a child-friendly adaptation of the Wikipedia article on Quasar, available under CC BY-SA 4.0.

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