https://padlet.com/27kisstr/aqm1zetyk9b6ia6j Made with a taste for adventure en-us 2021-06-01 13:31:35 UTC 2021-06-02 13:00:30 UTC hello@padlet.com 27acriru https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576292498 Recent evidence suggests that this scenario is unlikely but has not been ruled out, as measurements have been available only over a short period of time, relatively speaking, and could reverse in the future. This scenario allows the Big Bang to occur immediately after the Big Crunch of a preceding universe.]]> 2021-06-01 13:47:27 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576292498 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576319258 Nazi Germany saw the possibilities of using long-distance rockets as weapons. Late in World War II, London was attacked by 200-mile-range V-2 missiles, which arched 60 miles high over the English Channel at more than 3,500 miles per hour. After World War II, the United States and the Soviet Union created their own missile programs.]]> 2021-06-01 13:54:50 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576319258 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576322018 In the latter half of the 20th century, rockets were developed that were powerful enough to overcome the force of gravity to reach orbital velocities, paving the way for space exploration to become a reality.]]> 2021-06-01 13:55:34 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576322018 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576348832 the Soviets launched the first artificial satellite, Sputnik 1, into space. Four years later on April 12, 1961, Russian Lt. Yuri Gagarin became the first human to orbit Earth in Vostok 1. His flight lasted 108 minutes, and Gagarin reached an altitude of 327 kilometers (about 202 miles).]]> 2021-06-01 14:03:17 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576348832 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576375172 The first U.S. satellite, Explorer 1, went into orbit on Jan. 31, 1958. In 1961, Alan Shepard became the first American to fly into space. On Feb. 20, 1962, John Glenn’s historic flight made him the first American to orbit Earth]]> 2021-06-01 14:10:36 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576375172 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576382541 “Landing a man on the moon and returning him safely to Earth within a decade” was a national goal set by President John F. Kennedy in 1961. On July 20, 1969, astronaut Neil Armstrong took “one giant leap for mankind” as he stepped onto the moon. Six Apollo missions were made to explore the moon between 1969 and 1972.]]> 2021-06-01 14:12:40 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576382541 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576384952 During the 1960s, unmanned spacecraft photographed and probed the moon before astronauts ever landed. By the early 1970s, orbiting communications and navigation satellites were in everyday use, and the Mariner spacecraft was orbiting and mapping the surface of Mars. By the end of the decade, the Voyager spacecraft had sent back detailed images of Jupiter and Saturn, their rings, and their moons.]]> 2021-06-01 14:13:19 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576384952 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576397163 Skylab, America’s first space station, was a human-spaceflight highlight of the 1970s, as was the Apollo Soyuz Test Project, the world’s first internationally crewed (American and Russian) space mission. In the 1980s, satellite communications expanded to carry television programs, and people were able to pick up the satellite signals on their home dish antennas. Satellites discovered an ozone hole over Antarctica, pinpointed forest fires, and gave us photographs of the nuclear power plant disaster at Chernobyl in 1986. Astronomical satellites found new stars and gave us a new view of the center of our galaxy.

]]> 2021-06-01 14:16:36 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576397163 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576401861 In April 1981, the launch of the space shuttle Columbia ushered in a period of reliance on the reusable shuttle for most civilian and military space missions. Twenty-four successful shuttle launches fulfilled many scientific and military requirements until Jan. 28,1986, when just 73 seconds after liftoff, the space shuttle Challenger exploded. The crew of seven was killed, including Christa McAuliffe, a teacher from New Hampshire who would have been the first civilian in space.]]> 2021-06-01 14:17:55 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1576401861 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1579364850 The Columbia disaster was the second shuttle tragedy. On Feb. 1, 2003, the shuttle broke apart while reentering the Earth’s atmosphere, killing all seven crew members. The disaster occurred over Texas, and only minutes before it was scheduled to land at the Kennedy Space Center. An investigation determined the catastrophe was caused by a piece of foam insulation that broke off the shuttle’s propellant tank and damaged the edge of the shuttle’s left  wing. It was the second loss of a shuttle in 113 shuttle flights.After each of the disasters, space shuttle flight operations were suspended for more than two years.]]> 2021-06-02 12:58:20 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1579364850 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1579369035 Discovery was the first of the three active space shuttles to be retired, completing its final mission on March 9, 2011; Endeavour did so on June 1. The final shuttle mission was completed with the landing of Atlantis on July 21, 2011, closing the 30-year space shuttle program.]]> 2021-06-02 12:59:54 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1579369035 27kisstr https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1579370527 The Gulf War proved the value of satellites in modern conflicts. During this war, allied forces were able to use their control of the “high ground” of space to achieve a decisive advantage. Satellites were used to provide information on enemy troop formations and movements, early warning of enemy missile attacks, and precise navigation in the featureless desert terrain. The advantages of satellites allowed the coalition forces to quickly bring the war to a conclusion, saving many lives.]]> 2021-06-02 13:00:30 UTC https://padlet.com/27kisstr/aqm1zetyk9b6ia6j/wish/1579370527