Mariner 10’s first image of Mercury. During its flight,...

Mariner 10’s first image of Mercury. During its flight, Mariner 10’s trajectory brought it behind Mercury, where this image was taken, in order to acquire important measurements. This picture was acquired from a distance of 3,340,000 miles from the surface of Mercury. [2557 x 4800] via /r/spaceporn https://ift.tt/2TUN5Ez

via Tumblr https://ift.tt/2HSgGHg