Astronomers have detected a massive object made up of dark matter, invisible to the naked eye, but whose mass is a million times larger than that of the sun. This significant discovery was made possible through a phenomenon called gravitational microlensing, a process that allows astronomers to measure the mass of other celestial objects based on the way they bend light around them.
The research team, comprised of scientists from the University of Manchester, UK, utilized the University of Warsaw’s Optical Gravitational Lensing Experiment (OGLE) project to make this groundbreaking discovery. The OGLE project makes use of the 1.3-meter Warsaw Telescope located at the Las Campanas Observatory in Chile.
The gravitational microlensing event, dubbed OGLE-2016-BLG-1928, took place over a period of 41.5 minutes. This short duration of the microlensing event, one of the shortest ever observed, indicated that the source of the gravitational pull was likely a relatively small object. After extensive calculations, the researchers concluded that the object was a low-mass rogue planet, or a free-floating planet.
The discovery of this rogue planet is significant as it supports the theory that such low-mass rogue planets could be made up of dark matter. Dark matter is a mysterious and invisible substance that is thought to make up about 27% of the universe. However, it has been difficult to detect and study due to its elusive nature.
While the discovery of this massive dark matter object is a significant step forward, scientists are still far from fully understanding the true nature of dark matter. The detection of this object provides an exciting opportunity for further study and exploration. It is hoped that this discovery will fuel additional research and potentially lead to new techniques to detect and study these elusive celestial objects.
This research also underscores the importance of gravitational microlensing as a valuable tool in the study of dark matter and other celestial phenomena. With advancements in technology and further research, it is expected that more such invisible massive objects will be detected, providing more clues about the mysterious nature of the universe.