The first discovery of gamma rays coming from near galaxies has been made by ultra-fast outflows.

  • For the first time, astronomers have discovered that gamma radiations are being emitted from super-fast outflows from nearby galaxies.
  • UFOs can be winds from black holes with supermassive masses. They could have an impact on the size of the galaxy and black hole.  
  • Acretion is the term for black holes which are actively consuming matter. 
  • UFOs have a significant role in the growth and size of galaxies. They can also move gas across the galactic surface. 

Astronomers discovered that gamma radiations from UFOs, or ultra-fast outflows from galaxies nearby for the first time have been detected. This discovery could help to shed some light on the origins of the Milky Way. 

A group of researchers — led by those at Clemson University — used data from the Large Area Telescope onboard NASA’s Fermi Gamma-ray Space Telescope and a stacking technique to combine weak signals to find the gamma rays from UFOs.

UFOs should not be confused with extraterrestrials. These powerful winds come from black holes, which could have an impact on how big the black hole grows and the galaxy that hosts it. 

All galaxies have supermassive black holes at their centers, including the Milky Way, which is home to Sagittarius A*.

Astronomers discovered gamma rays emanating from ultra-fast outflows (UFOs) coming from several nearby galaxies for the first time

For the first time, astronomers have discovered that gamma radiations from UFOs (ultra-fast outflows) from nearby galaxies emit gamma.

UFOs are winds that come from supermassive black holes that could play a role in how large the black hole and the galaxy get

UFOs can be winds from black holes with supermassive masses. They could have an impact on the size of the black hole or the Galaxy.

While some of these black holes may be dormant others can be called active galactic nuclei.

In recent years, scientists have found that Sagittarius A*, the supermassive black hole at the middle of the Milky Way, is more active than previously thought, though it is not classified as active.

Chris Karwin, the lead author of the study, stated in a statement that the winds were difficult to find. 

“Our gamma radiation observations reveal how supermassive Black holes can transmit a significant amount of energy towards their host galaxy. 

“These UFOs cause shock waves which act like pistons. They also accelerate charged particles (known as cosmic rays) to speeds close to light speed. 

Active black holes ‘eat up’ the material of surrounding celestial objects, which is called accretion.

The black holes that are active suck up surrounding celestial objects around and 'eat' their matter, a process known as accretion

Black holes are active because they eat the matter of celestial objects surrounding them. This process is known as accretion.

The winds play an important role in UFOs’ size and growth. They can also move gas over long periods of time, if strong enough.

According to the authors, this can alter the relation between the mass of central black holes and velocity dispersion stars in gallactic bulges.

Marco Ajello, study coauthor and author of the study said that the effect on galaxy was dramatic. 

For UFOs, the winds actually play a role in the size of the galaxy and how it grows, something that can actually move gas (if powerful enough) over time throughout galaxies

Winds play a significant role in galaxy size and development. If strong enough, they can move gas throughout the universe.

‘The black hole at the center of the galaxy and the galaxy itself have a mechanism to grow together in mass—and this is the mechanism.’

Karwin explained, “Gamma Rays are created by cosmic radiations.” It is possible that UFOs can be used to energize particles between extragalactic and gallactic cosmic, Karwin said.

The study could help give more insight into when Sagittarius A* stopped being active, Karwin noted.

‘Today, our black hole, Sagittarius A*, is not active, but it’s possible it was active in the recent past, maybe up until a few hundred years ago,’ Karwin said. 

“Our model supports our hypothesis that the Fermi bubbles could be remnants from past UFO-like activity in the centre of the galaxy.” 

The Astrophysical Journal published the study. 


The galactic centre of the Milky Way is dominated by one resident, the supermassive black hole known as Sagittarius A*.

These supermassive dark holes can form in galaxies’ centers, with masses as large as billions of times those of the sun.

These are intense sources of gravitation that lift up gas and dust around them. 

Karl Jansky was the first person to show evidence that there is a black hole in the middle of the galaxy. He discovered radio waves emanating from the area and presented it as evidence. 

Pre-eminent yet invisible, Sgr A* has the mass equivalent to some four million suns.  

At just 26,000 light years from Earth, Sgr A* is one of very few black holes in the universe where we can actually witness the flow of matter nearby.

Less than one per cent of the material initially within the black hole’s gravitational influence reaches the event horizon, or point of no return, because much of it is ejected. 

Consequently, the X-ray emission from material near Sgr A* is remarkably faint, like that of most of the giant black holes in galaxies in the nearby universe.

Before the captured material can plunge into the black holes, it must lose heat and angular momentum. This loss can be prevented by the ejection.