Half a century ago, Mariner 9 – our first orbiter at another planet — showed us the real Mars.
The post Mariner 9: The Martian Semicentennial appeared first on Sky & Telescope.
Half a century ago, Mariner 9 – our first orbiter at another planet — showed us the real Mars.
The post Mariner 9: The Martian Semicentennial appeared first on Sky & Telescope.