NASA’s Hubble Space Telescope has unveiled astonishing new details about FU Orionis (FU Ori), a young star in the constellation Orion known for its dramatic brightness outburst nearly a century ago.

In 1936, astronomers saw a puzzling event in the constellation Orion: the young star FU Orionis (FU Ori) became a hundred times brighter in a matter of months. At its peak, FU Ori was ...