On This Date in History

On August 20, 1975, Viking 1, an unmanned U.S. planetary probe, is launched from Cape Canaveral, Florida, on a mission to Mars.
On June 19, 1976, the spacecraft entered into orbit around Mars and devoted the next month to imaging the Martian surface with the purpose of finding an appropriate landing site for its lander. On July 20, the seventh anniversary of the Apollo 11 lunar landing, the Viking 1 lander separated from the orbiter and touched down on the Chryse Planitia region, becoming the first spacecraft to successfully land on the surface of Mars. The same day, the craft sent back the first close-up photographs of the rust-colored Martian surface.
In September 1976, Viking 2, launched only three weeks after Viking 1, entered into orbit around Mars, where it assisted Viking 1 in imaging the surface and also sent down a lander. During the dual Viking missions, the two orbiters imaged the entire surface of Mars at a resolution of 150 to 300 meters, and the two landers sent back more than 1,400 images of the planet’s surface.

 

 

On August 20, 1982, during the Lebanese Civil War, a multinational force including 800 U.S. Marines lands in Beirut to oversee the Palestinian withdrawal from Lebanon. It was the beginning of a problem-plagued mission that would stretch into 17 months and leave 262 U.S. servicemen dead.
In 1975, a bloody civil war erupted in Lebanon, with Palestinian and leftist Muslim guerrillas battling militias of the Christian Phalange Party, the Maronite Christian community, and other groups. During the next few years, Syrian, Israeli, and United Nations interventions failed to resolve the factional fighting, and in August 1982 a multinational force arrived to oversee the Palestinian withdrawal from Lebanon.
The Marines left Lebanese territory on September 10 but returned on September 29 following the massacre of Palestinian refugees by a Christian militia. The next day, the first U.S. Marine to die during the mission was killed while defusing a bomb. On April 18, 1983, the U.S. embassy in Beirut was devastated by a car bomb, killing 63 people, including 17 Americans. Then, on October 23, Lebanese terrorists evaded security measures and drove a truck packed with explosives into the U.S. Marine barracks in Beirut, killing 241 U.S. military personnel. Fifty-eight French soldiers were killed almost simultaneously in a separate suicide terrorist attack. On February 7, 1984, President Ronald Reagan announced the end of U.S. participation in the peacekeeping force.

 

 

 

On August 20, 1911, a dispatcher in the New York Times office sends the first telegram around the world via commercial service. Exactly 66 years later, the National Aeronautics and Space Administration (NASA) sends a different kind of message, a phonograph record containing information about Earth for extraterrestrial beings, shooting into space aboard the unmanned spacecraft Voyager II.
The Times decided to send its 1911 telegram in order to determine how fast a commercial message could be sent around the world by telegraph cable. The message, reading simply “This message sent around the world,” left the dispatch room on the 17th floor of the Times building in New York at 7 p.m. on August 20. After it traveled more than 28,000 miles, being relayed by 16 different operators, through San Francisco, the Philippines, Hong Kong, Saigon, Singapore, Bombay, Malta, Lisbon and the Azores, among other locations, the reply was received by the same operator 16.5 minutes later. It was the fastest time achieved by a commercial cablegram since the opening of the Pacific cable in 1900 by the Commercial Cable Company.

 

 

On August 20, 1977, a NASA rocket launched Voyager II, an unmanned 1,820-pound spacecraft, from Cape Canaveral, Florida. It was the first of two such crafts to be launched that year on a “Grand Tour” of the outer planets, organized to coincide with a rare alignment of Jupiter, Saturn, Uranus and Neptune. Aboard Voyager II was a 12-inch copper phonograph record called “Sounds of Earth.” Intended as a kind of introductory time capsule, the record included greetings in 60 languages and scientific information about Earth and the human race, along with classical, jazz and rock ‘n’ roll music, nature sounds like thunder and surf, and recorded messages from President Jimmy Carter and other world leaders.
The record was sent with Voyager II and its twin craft, Voyager I, launched just two weeks later, in the faint hope that it might one day be discovered by extraterrestrial creatures. The record was sealed in an aluminum jacket that would keep it intact for 1 billion years, along with instructions on how to play the record, with a cartridge and needle provided.
More importantly, the two Voyager crafts were designed to explore the outer solar system and send information and photographs of the distant planets to Earth. Over the next 12 years, the mission proved a smashing success. After both crafts flew by Jupiter and Saturn, Voyager I went flying off towards the solar system’s edge while Voyager II visited Uranus, Neptune and finally Pluto in 1990 before sailing off to join its twin in the outer solar system.
Thanks to the Voyager program, NASA scientists gained a wealth of information about the outer planets, including close-up photographs of Saturn’s seven rings; evidence of active geysers and volcanoes exploding on some of the four planets’ 22 moons; winds of more than 1,500 mph on Neptune; and measurements of the magnetic fields on Uranus and Neptune. The two crafts are expected to continue sending data until 2020, or until their plutonium-based power sources run out. After that, they will continue to sail on through the galaxy for millions of years to come, barring some unexpected collision.