It’s been nearly two years since the “Great American Eclipse”. Millions crammed into a 70-mile (110-kilometer) wide path of totality stretching from coast to coast, where the Moon blotted out the Sun to usher in a spontaneous nightfall. It was a planetary cavalcade unlike anything most had seen.

This Tuesday, Earth will again find itself the backdrop of the Moon’s shadow, but this time, basking in the lunar umbra won’t be so easy. Though the path of totality spans 6,000 miles (9,600 kilometres), most of it is over the remote South Pacific.

Only a narrow zone in Chile and Argentina will witness totality before sunset – weather permitting.