 Its surface features include large craters and high mountains—some of them are comparable to the size of the moon itself.Thebe was photographed in 1979 by the "Voyager 1" and "2" spacecraft, and later, in more detail, by the "Galileo" orbiter in the 1990s.Thebe was discovered by Stephen P. Synnott in images from the "Voyager 1" space probe taken on March 5, 1979, and was initially given the provisional designation .