Scientists Say the Supermassive Black Hole at the Center of Our Galaxy Is Repeatedly Sending Mysterious Signals Every 76 Minutes

Most large galaxies in our universe are thought to have a supermassive black hole at their center. They play a very significant role in the formation and evolution of those galaxies.

Although their direct observation remains a challenge to us, we know that the stars and planets orbit the galactic center, implying that a very powerful gravitational force is present at the center, which is most likely a black hole.

Our Milky Way galaxy is not different; we have a supermassive black hole named Sagittarius A* (pronounced “Sagittarius A-star”). Its mass is equivalent to millions or even billions of our Sun. Recently, scientists have found out that this specific black hole at the center of our galaxy is constantly sending signals that echo through the whole Milky Way.

Regular Gamma‑Ray “Beats”

About every 76 minutes, Astronomers found out that Sagittarius A* is regularly sending signals made up of bursts of gamma‑ray radiation throughout the Milky Way galaxy.

These pulses were recorded through a combination of radio signals and X-ray flares. Through Fermi telescope data, scientists noticed that the periodicity is similar in both fields, which implies that it was coming from the same signal that Sagittarius A* is emitting.

According to the studies and NASA, the rhythmic pattern over multiple wavelengths suggests that some type of process or event is happening repeatedly near the black hole. It might be some galactic bodies orbiting or spinning around it that trigger the energy blasts that we are detecting. In short, we do not currently know why and are awaiting more advanced studies to find out more.

Read more: Live Science

What Could Be Causing It?

76 Minute Long Pulses Coming From the Central Black Hole...Why Though?

Although no proof or evidence yet is accepted by the whole scientific community the top theories could still explain what could be the reason why this signal is happening.

Researchers believe that there is a hot gas orbiting around Sagittarius A* at roughly 30% of the speed of light. Its velocity, together with the strong magnetic field, is probably causing the gas to heat up and accelerate the particles around it, which in turn produces the gamma rays, radio signals, and X‑ray wavelengths that have been detected.

Rewriting Our View of Quiet Black Holes

Black holes are thought to be quiet because they do not emit light or sound on their own. They are also difficult to detect unless they are consuming stars or other galactic bodies. Sagittarius A* specifically is a low-activity black hole, which means it only eats up a small amount of matter.

However, this discovery highlights that even “quiet” black holes could possess some processes around them that could cause a galaxy-wide noise. Since black holes themselves do not release radiation, and these pulses are evenly spaced, the theory that something is orbiting it, likely a hot gas, would be the leading explanation for the signals every 76 minutes.

Read more: Science Alert

A Window Into Extreme Physics

These findings, as mentioned earlier, are still awaiting peer reviews and even more advanced studies to be verified or understood more. But if they were confirmed, then it would change how we view the surroundings of not only our own supermassive black hole right at the middle of the galaxy, but every single one of them.

Gravity, acceleration, and magnetic forces are all around a black hole’s horizon. This means if we study these signals, we could get a glimpse of how matter like our human body and planets will behave in the most extreme gravitational environment possible.

Introducing Sagittarius A * [Milky Way Black Hole] #blackhole

Author's Final Thoughts

The rhythmic cosmic pulse coming from the center of our galaxy suggests that something massive and fast is orbiting around the Sagittarius A* black hole, which was thought to be quiet for decades.

This event is currently producing regular flares across multiple wavelengths that we detect on Earth every 76 minutes, and scientists believe that studying this phenomenon further will unlock secrets of gravity, magnetism, and matter in ways we’ve never seen before.

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