NASA’s Viking 1 Mars landing on this day in 1976, a milestone in space exploration:

On This Day: Viking 1 Lands on Mars

On July 20, 1976, NASA’s Viking 1 became the first spacecraft to land successfully on Mars and send back clear images.

A Historic Touchdown

Viking 1 landed in Chryse Planitia, beginning a new era in planetary science and exploration of the Red Planet.

First Clear Images from Mars

Shortly after landing, Viking 1 sent the first-ever clear photos from the Martian surface, revealing a dusty, rocky landscape.