Space's mysterious blue flashes are more than just cosmic ghosts

Space · Published 21 October 2026 Swipe more like this →

In short: In September 2022, astronomers captured a flash of light billions of times brighter than our sun. These sudden bursts, known as LFBOTs, were so fast and intense that scientists initially questioned if they were even real or merely satellite interference.

Luminous fast blue optical transients (LFBOTs) are extraordinary cosmic events characterized by incredibly swift, bright flares of blue light. One notable observation occurred in a galaxy roughly one billion light-years away. This specific event was approximately 10 billion times more powerful than the sun. The sheer speed and intensity of these outbursts have left the scientific community searching for an explanation that fits such a rapid timescale. The initial observation was recorded by a telescope located in Southern California. These events were first identified as a distinct category of outbursts back in 2018.

A recent study published in the journal Nature, featuring research by Anna Ho from Cornell University and Daniel Perley from Liverpool John Moores University, provides a new framework for understanding these phenomena. Researchers identified 14 total flares over several months following an initial explosion. These flashes are peculiar because they recur as brief glares lasting only tens of seconds, appearing months after the primary celestial event has already faded. Astronomers initially worried the data might just be an image of a satellite. They eventually confirmed the phenomenon by monitoring the same position with multiple different telescopes.

The research suggests that the driving force behind these blasts is a dense stellar corpse—specifically a neutron star or a black hole remaining from a massive star's death. This discovery helps settle a long-standing debate regarding what powers such intense light. By using high-speed optical cameras to capture data on the flares' unprecedentedly short duration, scientists can now better categorize these events as real physical phenomena rather than imaging artifacts. The study clarifies that these flares occur in the aftermath of another event. This finding has motivated researchers globally to investigate such unprecedented cosmic behavior.

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