... crescent Mars from Viking2 53k gif . first images of Mars from Mariner 4 html . ... looking down on Phobos and Mars from Viking2 Orbiter 456k gif ( caption ) . ... Images from Viking2 Orbiter html . Mosaic of Deimos 181k gif . ...
... Viking2 . Viking2 was launched on September 9, 1975, and arrived in Martian orbit on August 7, 1976. ... Viking2 . Viking2 was launched on September 9, 1975, and arrived in Martian orbit on August 7, 1976. ...
... Explanation: On July 20, 1976 , NASA's Viking 1 lander became the first U.S. spacecraft to land on Mars , followed weeks later by its twin robot explorer, the Viking2 lander. ...
... Explanation: On July 20, 1976 , NASA's Viking 1 lander become the first spacecraft to land on Mars , followed weeks later by its twin robot explorer, the Viking2 lander. ...
... Explanation: Hurtling through space a mere 3,000 miles above the Martian surface , the diminutive moon Phobos (below and left of center) was imaged against the backdrop of a large shield volcano by the Viking2 Orbiter in 1977. ...
... Explanation: Hurtling through space a mere 3,000 miles above the Martian surface , the diminutive moon Phobos (below and left of center) was imaged against the backdrop of a large shield volcano by the Viking2 Orbiter in 1977. ...
... Explanation: Hurtling through space a mere 3,000 miles above the Martian surface , the diminutive moon Phobos (below and left of center) was imaged against the backdrop of a large shield volcano by the Viking2 Orbiter in 1977. ...