A new NASA radar technique has just found something astonishing circling the moon many miles away: a long-lost lunar probe launched by India that went missing eight years ago. Chandrayaan-1 is a very small spacecraft that is jut five feet on each size, half the size of a small car, and scientists were able to locate it with a remarkable new method using radar.

It is known as the “Mars Antenna” as it was first to receive signals from the first spacecraft to closely observe Mars, Mariner 4, on March 18, 1966. Finding derelict spacecraft and space debris in Earth’s orbit can be a technological challenge.