After observing for over four days using the Keck II Telescope in Hawaii, a team that has been studying Sagittarius A* for 20 plus years noticed the infrared light increased by 75 times.
Scientists aren’t quite sure why this strange flash occurred, but it’s apparently nothing to be concerned about.
Speaking to ScienceAlert, Tuan Do (an author on the study which spotted the bright light) said the flash could be the result of another star (S02) passing close by, thereby changing the way gas flows into the black hole. Another working theory is the flash was caused by G2, a gas cloud which also recently passed close (36 light-hours) to the black hole in 2014. There is a possibility this is a delayed reaction to that event.
Other teams and telescopes, such as Spitzer, Swift, Chandra, and ALMA, have also been observing Sagittarius A*. Do is curious to see if they too spotted the strange emission. Perhaps that data can help shed new light on this strange burst of infra-red light.