On April 12, 1961, Yuri Gagarin became the first human to enter space and the first to orbit Earth.
Vostok 1’s mission lasted for 108 minutes, and Gagarin and his capsule completed one orbit of Earth. 1/8
The R-7 rocket which lifted Gagarin into space had a 50% success rate at this point in history. Thankfully, Gagarin's launch was successful, and he experienced the wonders of seeing Earth from space. He ate, took notes, and operated the spacecraft during his time in orbit. 2/8
Things were progressing nominally until just after the retrorockets fired for reentry. A tumbling motion, about thirty degrees per second, put Gagarin into an uncontrolled spin. The spherical DM didn’t separate from the instrument section of the spacecraft as planned. 3/8
Eventually, the two parts of the spacecraft separated as they were supposed to, allowing the capsule and Gagarin to return to Earth.
Unlike other spacecraft, Cosmonauts ejected from their Vostok capsule before landing. 4/8
A hatch opened on the side of the spacecraft and seconds later the Cosmonaut, still in their seat, ejected out and landed by parachute.
The capsule landed harder than was survivable, which is why cosmonauts had to bail out early. 5/8
Gagarin landed in a field, and after walking a bit, he saw a woman who helped him find a telephone so he could radio back that he was ok.
Gagarin toured the world on goodwill tours and even met Gemini 4 astronauts at the Paris International Air Show in June of 1965. 6/8
Sadly, Yuri never flew in space again, and he died in a crash in a MiG-15 trainer jet.
He, along with 13 others lost in the pursuit of spaceflight are memorialized on a plaque left behind by Apollo 15 astronauts. 7/8
They also left behind a small figure representing the fallen astronauts and cosmonauts. You can read more about the replica Fallen Astronaut statuette we have in our collection here: bit.ly/3wCKuyB 8/8

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More from @kscosmosphere

12 Apr
On April 12, 1981, 20 after Yuri Gagarin's historic first spaceflight, John Young and Robert Crippen lifted off into the history books as the first crew of the Space Shuttle program on STS-1.
The Shuttle Columbia lifted off seconds after 7 a.m. Eastern time from Pad 39A. 1/7
Their mission was the first time that astronauts had flown on a launch vehicle that hadn’t previously been tested.
The Shuttle stack, which consisted of the orbiter, solid rocket boosters (SRBs), and external tank (ET), flew together for the first time. 2/7
Commander John Young, a Gemini and Apollo veteran, and rookie astronaut Robert Crippen spent two days in space, testing orbiter systems and demonstrating “safe launch into orbit and return to landing of Columbia and its crew.” 3/7
Read 7 tweets
11 Apr
Liftoff of Apollo 13! "The clock is running." 👨‍🚀👨‍🚀👨‍🚀❤️🙌🏼

Apollo 13 lifted off at 2:13 p.m. EDT on April 11, 1970. The original goal of this mission was to land in the hilly upland region of the Moon, called the Fra Mauro highlands. 1/12
This was supposed to be the third mission to land on the Moon.

The original crew members for Apollo 13 were astronauts Jim Lovell, Ken Mattingly, and Fred Haise. 2/12
Ken Mattingly was inadvertently exposed to the German measles in the days before the launch, necessitating his replacement. This meant that Jack Swigert became the Command Module Pilot just three days before liftoff. 3/12
Read 12 tweets
9 Apr
On This Day: NASA introduced the world to the Mercury Seven during a press event on April 9, 1959. The Mercury Seven included, from l-r: Wally Schirra, Alan Shepard, Gus Grissom, Deke Slayton, John Glenn, Scott Carpenter and Gordon Cooper. 1/4 Image
NASA's Astronaut Group 1 or the Mercury Seven, as they're more widely known, were a group of skilled test pilots pulled from the Marines, Navy, and Air Force. Over 500 pilots applied for the program, but that group narrowed down to these seven astronauts pictured here. 2/4 Image
The Mercury Seven went on to have incredible careers, in and out of NASA. Every member of the group, except Deke Slayton, flew during the Mercury Program. Slayton's first spaceflight was during the Apollo Soyuz Test Project, which launched 45 years ago today on July 15, 1975. 3/4
Read 4 tweets
31 Mar
To round out the end of Women's History Month...of course we have to mention the Cosmosphere's founder, Patty Carey (1921-2003)!

Have you ever wondered why Hutchinson, Kansas, is the home of the Cosmosphere? It's because of our wonderful founder, Patty Carey. 1/7
Her desire to share the wonders of astronomy became the foundation for the Cosmosphere's internationally recognized space artifact collection. 2/7
Fueled by her life-long interest in science, Patty established the first planetarium in the state of Kansas in 1962, called "Hutchinson's Theatre of the Skies" and later changed to "The Hutchinson Planetarium," ... 3/7
Read 7 tweets
30 Mar
Eileen Collins was born in Elmira, New York in 1956. When she was young, she found her inspiration in the Mercury astronauts – but noticed during that time, there wasn't any women astronauts to look up to. 1/10
She received an associate’s in math/science from Corning CC and went on to achieve a bachelor’s in math and economics from Syracuse University. After that she got her master’s in operations research at Stanford AND a master’s in space systems management from Webster Uni. 2/10
She attended Vance Air Force Base where she was one of four women chosen for the Undergraduate Pilot Training. There she earned her pilot wings and became a T-38 Talon instructor pilot and eventually a C-141 Starlifter pilot. 3/10
Read 10 tweets
29 Mar
@poppy_northcutt graduated from University of Texas at Austin with a degree in mathematics and started as a contractor for TRW Systems (now a part of Northrup Grumman) working for NASA in 1965 as a human “computress.” 1/8 Image
“What a weird title this is,” she recalled thinking then, in an interview with TIME magazine in 2019 “Not only do they think I’m a computer, but they think I’m a gendered computer.” She was promoted a year later to Return-to-Earth Specialist, calculating mission trajectories.2/8
Making her the first women in a technical position at Johnson Space Center, Houston, TX.

Poppy was the only woman working in NASA's Mission Control during the Apollo 8 mission. (Her work involved Trans-Earth Injection.) 3/8
Read 8 tweets

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