For a while, astronomers believed one of the universe’s true giants was nearing a dramatic end. The star, nicknamed “Behemoth,” sits about 163,000 light-years from Earth and ranks among the largest stars ever studied. When researchers noticed its light fading over recent years, it fueled speculation that the star could be on the verge of becoming a supernova.
That idea was especially exciting because Behemoth is estimated to be around 1,500 times larger than the Sun. If a star of that scale were to explode, it would be an extraordinary event for scientists to analyze, even from such a great distance. But new evidence suggests the dimming wasn’t the countdown to an imminent blast after all.
Earlier observations in 2024, including imagery captured with the Very Large Telescope in Chile, showed gas and dust surrounding the star. That kind of material can be associated with stars that are destabilizing and shedding mass, which helped reinforce the supernova expectations. However, follow-up research indicates the situation is more complex—and far less explosive in the near term.
A team from Keele University in the United Kingdom used spectroscopic measurements from the Southern African Large Telescope to take a closer look at Behemoth’s atmosphere. Their analysis revealed titanium oxide, a key chemical clue. The presence of titanium oxide strongly indicates the star is still a red giant, not a yellow hypergiant—a stage more closely linked to a star heading toward a supernova.
So why the noticeable changes in brightness? Scientists now suspect the real culprit may be a smaller companion: a nearby blue star. If this companion is close enough, its gravity could be tugging at material and influencing how dust and particles move around Behemoth. That interaction may explain the circumstellar disk observed around the star known as WOH G64, along with the puzzling fluctuations in its light.
For stargazers hoping for a soon-to-arrive cosmic fireworks show, the takeaway is simple: patience. Behemoth doesn’t appear ready to explode anytime soon. Instead, it’s offering researchers something just as valuable—a new set of mysteries about how the largest stars evolve, interact with nearby companions, and shed material into space long before their final act.
