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The supermassive Black Hole, known as "Sagittarius A *" (or Sgr A *), has been watched by scientists for years. Although this space giant was relatively quiet for a black hole, everything has changed lately, emitting an unprecedented amount of radiation.
An astronomer from the University of California, Los Angeles (UCLA) has shared a 2.5-hour period of images of the supermassive black hole Sgr A * with a record amount of glow around them. Researcher Tuan Do, whose team is studying this giant in the center of our galaxy at the WM Keck Observatory in Hawaii, found that it became 75 times brighter this May.
Here is a timelapse of images over 2.5 hours from May of @keckobservatory of the supermassive black hole Sgr A *. The black hole is always variable, but this was the brightest we've ever seen in the infrared. It was probably even brighter when we started watching this night! pic.twitter.com/MwXioZ7twV
̵1; Tuan Do (@quantumpenguin) August 11, 2019
His team has published an article about their discovery in Astrophysical Journal Letters. The article states that the very variable black hole of the Milky Way has been observed in the near infrared for over 20 years, reaching significantly brighter flow rates in 2019 than ever before.
An unprecedented space show remains a mystery. As the astronomer pointed out, hot gas falls on the black hole before it crosses the event horizon, making the space around it brighter as black holes do not emit light. He suggested that increased activity might be related to changes in gas flow, but struggled to define why this happened or how long it would take.
The researchers put forward various hypotheses. Their work suggested that the potential physical cause for the unprecedented magnitude of Sgr A * might be a change in accretion flux after the transition of a star near 2018, or even a delayed response to the approach of a dusty object in 2014.  Tuan Do assured everyone on Twitter, "What's going on with the black hole will not affect Earth," since it's 26,000 light-years or 260 quadrillion miles away. There is also a lot of dust behind it.
"Although it is very bright compared to historical data, it is not enough to influence us. Enjoy the fireworks and we hope to learn some cool black hole physics! "Tweeted the astronomer.