Nasa/ESA Hubble Space Telescope captured a rare triple moon transit of Jupiter event.
Hubble took a string of images of the event which show three of Jupiter’s largest moons, Europa, Callisto and Io, in action.
The three moons are known as Galilean moons since they were discovered by the scientist during the 17th century. With orbits ranging from two to 17 days, it’s common for at least one of the moons to be seen orbiting the Jupiter. However, the convergence of the three is an occurrence so rare that NASA said it happens only once or twice per decade.
The fourth Galilean moon, Ganymede, was outside Hubble’s view and was not part of the celestial sight.
The images were taken with Hubble’s Wide Field Camera 3 in visible light late last month.
