Exceedingly Rare Astronomical events before 2100
Every single day, a mind-boggling amount of data filters through our observatories from the universe at large. Every piece is useful to science, even though much of it seems unremarkable to the public. But some discoveries are so rare or unexpected that even cosmophobes probably crack a little smile.
no hypothesis is supported by evidence in our own solar system: Jovian satellite Io is similarly close to its parent, and tidal forces ripping at the moon’s body have turned it into a giant volcano.