On October 18, 1989, the unmanned NASA spacecraft Galileo was launched on her mission to study the planet Jupiter and its moons. Named after the astronomer Galileo Galilei, it consisted of an orbiter and entry probe, which descended into Jupiter's atmosphere.
On July 17, 1995, the Global Positioning System (GPS), the world's first space-based satellite navigation system is declared operational. GPS provides location and time information in all weather conditions, anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites.
On 12 April 1961, aboard the Vostok 3KA-3 (Vostok 1), Soviet pilot Yuri Gagarin became both the first human to travel into space, and also the first to orbit the earth.
On April 11, 1970, at 13:13 CST Apollo 13 was launched from the Kennedy Space Center, Florida, but the lunar landing was aborted after an oxygen tank exploded two days later, crippling the service module upon which the Command Module depended. Despite great hardship caused by limited power, loss of cabin heat, shortage of potable water, and the critical need to jury-rig the carbon dioxide removal system, the crew returned safely to Earth on April 17.
On January 9, 1848, Caroline Lucretia Herschel, German-British astronomer and sister of astronomer Sir William Herschel, passed away at age 98. She is best know for the discovery of several comets, in particular the periodic comet 35P/Herschel-Rigollet, which bears her name.
On January 7, 1610, physicist and astronomer Galileo Galilei turned his new telescope to the nocturnal sky to watch the planet Jupiter and discovered the eponymous four moons of Jupiter, Io, Europa, Ganimede, and Callisto.
On October 4, 1957, the Soviet Union shocked the western world by announcing the first successful launch of an artificial satellite orbiting the earth - Sputnik 1.
Scientists and explorers we are...to boldly go where no man has gone before. If there is one scientist, who might serve as the prototype of an bold explorer, then we have to consider Auguste Piccard, a Swiss professor of physics, who tried to explore the deepest depths of the sea as well as the extreme stratosphere of the earth. And he did this not only in theory, but by experiment (always including his own person).
On July 20, 1969 (for Western Europeans it was one day later, i.e. July 21, 3:56 MEZ) United States' space mission Apollo 11 reached the moon with the lunar module Eagle and the two astronauts Neil Armstrong and Edwin "Buzz" Aldrin about 76 hours after they left earth from Kennedy Space Center in Florida.
394 years ago, famous astronomer Johannes Kepler discovered the 3rd and also last of his planetary laws, and concluded the general revolution of our celestial world that started with Nikolaus Kopernikus about 100 years earlier. And that made him rather popular as he still is today. Did you know that there is a Kepler crater on the Moon, a Kepler crater on Mars, a Kepler asteroid, a Kepler supernova, of course there has to be a space mission named after him, even an opera