Anders - who was a lunar module pilot on the Apollo 8 mission - took the iconic Earthrise photograph, one of the most memorable and inspirational images of Earth from space.

Taken on Christmas Eve during the 1968 mission, the first crewed space flight to leave Earth and reach the Moon, the picture shows the planet rising above the horizon from the barren lunar surface.

Anders later described it as his most significant contribution to the space programme.

The image is widely credited with motivating the global environmental movement and leading to the creation of Earth Day, an annual event to promote activism and awareness of caring for the planet.

Speaking of the moment, Anders said: "We came all this way to explore the Moon, and the most important thing that we discovered was the Earth."