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History of Spaceflight. First documented attempt at spaceflight in 1500 in China. Wan Hu (China) Fireworks (rockets) strapped to chair. Most math and physics used in spaceflight was developed 1650-1910!. Influence of Science Fiction. H. G. Wells Jules Verne.
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First documented attempt at spaceflight in 1500 in China • Wan Hu (China) • Fireworks (rockets) strapped to chair
Most math and physics used in spaceflight was developed 1650-1910!
Influence of Science Fiction H. G. Wells Jules Verne
First Space Engineers • Konstantin Tsiolkovsky(Russian, 1857-1935) • First to analyze rocket motion using Newton's Laws of Motion
Hermann Oberth(German, 1894-1989) • Published a paper in 1923 on the use of rockets for flying people into space
Robert Goddard (1882-1945) • Received first patent for a rocket in 1914 • first stable liquid-propellant rocket in 1926
German and Soviet Rocket Clubs formed in 1920's and 1930's • Werner von Braun (German) • Walter Dornberger (German) • Sergei Korolev (Russian)
After the war, some German rocket scientists went to the USSR and some to the US (including von Braun)
The Space Race • Primary interest in US and USSR was to develop rockets to deliver nuclear weapons to distant targets • Oct 4, 1957 -- USSR placed Sputnik I (184 lb satellite) into Earth orbit; • US feared that this meant USSR was technically superior and could launch nuclear weapons via rockets
Nov 3, 1957 -- USSR orbited Sputnik II (1120 lb spacecraft with passenger dog Laika, who lived for a week)
Werner von Braun took over US efforts • Explorer I (18 lb. satellite) into orbit on Jan 31, 1958
March 1958 -- Pres. Eisenhower formed NASA (the National Aeronautics and Space Admininstration)
National Defense Education Act • Signed into law on September 2, 1958
April 12, 1961 -- Yuri Gagarin became first human to orbit Earth
May 5, 1961 -- Alan Shepard flew for 15 min. on sub-orbital flight
Space Race became a race to the moon • Pres. Kennedy challenged US to send astronauts to moon and back before 1970
Rocket plane development (X-1, X-15) - • alternative path that US did not pursue • some believe it would have been better
X -15 • 1959 -1968 • World record for the fastest speed ever reached by a manned rocket powered aircraft. • 4,519 mph
Mercury Program • Single astronauts
Gemini Program • pairs of astronauts • first space walks
Apollo Program • triples of astronauts to the moon
Space Shuttle(National Space Transportation System --NSTS) • Development of shuttle system begun in 1970's • First orbiter -- Enterprise (named by popular demand of Star Trek fans)
List of orbiters: • Enterprise • Discovery • Atlantis • Endeavour (replaced Challenger) • Challenger (destroyed during launch, Jan. 28, 1986 -- all crew were lost) • Columbia (destroyed on re-entry, Feb. 1, 2003 -- all crew were lost)
Interstellar travel • http://www.youtube.com/watch?v=hdjL8WXjlGI
Difficulties of interstellar travel • Vast distances very great speed and/or a very long travel time • Vacuum • Radiation • Weightlessness • Micrometeoroids
The fastest outward-bound spacecraft yet sent, Voyager 1, would take 72,000 years to get to Proxima Centauri
Solar sail • Reduce time to ~ 2000 years
Nuclear pulse propulsion • Reduce time to ~ 100 years
Fusion Powered Spacecraft Human Outer Planet Exploration (NASA/MSFC, 2003),ICAN-II (The Pennsylvania State University)
Relativistic Time Dilation • As velocities approach the speed of light, relativistic time dilation would make the voyage much shorter for the traveler
Wormholes • Schwarzschild wormholes or Einstein-Rosen bridges are bridges between areas of space
http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/tdil.html