events
The American Viking 1 lander successfully lands on Mars.
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Viking 1
Robotic spacecraft sent to Mars
Viking 1 was the first of two spacecraft, along with Viking 2, each consisting of an orbiter and a lander, sent to Mars as part of NASA's Viking program. The lander touched down on Mars on July 20, 1976, the first successful Mars lander in history. Viking 1 operated on Mars for…Source: Wikipedia (CC BY-SA)
Mars
Fourth planet from the Sun
Mars is the fourth planet from the Sun. It is also known as the "Red Planet", because of its orange-red appearance. Mars is a desert-like rocky planet with a tenuous carbon dioxide atmosphere. At the average surface level the atmospheric pressure is a few thousandths of Earth's,…Source: Wikipedia (CC BY-SA)
July 20
Day of the year
July 20 is the 201st day of the year in the Gregorian calendar; 164 days remain until the end of the year.Source: Wikipedia (CC BY-SA)