Born on October 8, 1925, Van Hoeydonck was a prolific artist whose works spanned sculpture, painting, drawing, collage and graphic design.

He is best known for "Fallen Astronaut", an aluminium sculpture left on the moon in 1971 by the crew of the Apollo 15 spacecraft, in homage to their fallen colleagues.

It was the first and, for decades, the only work of art on show on the Moon's surface.

In February 2024, "Fallen Astronaut" was joined by 125 miniature sculptures by the American artist Jeff Koons.