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liquid-fuel rocket
robert goddard invented the liquid-fuel rocket -
sputnik
the space age began when the soviet union launched sputnik -
yuri gargarin
yuri gargarin became the first person to travel in space when he made a single orbit around the earth in his vostok 1 spacecraft -
john glenn
john glenn became the first american to orbit the earth -
valentina tereshkova
velentina tereshkova became the first woman to fly in space -
NASA
NASA conducted five more successs ful apollo moon landings -
apollo CSM
1969 as the apollo CSM columbia orbited the moon. -
sylut
in 1971 the USSER launched was used only brielly;five more salyut space stations were successfully operated -
skylab
the united states launched its first space station,skylab -
space shuttle
the united states launched the space shuttle -
mir
the soviet union launched the space station mir. -
tragically challenger
tragically challenger was destroyed by an accident shortly after launch in 1986 -
international space station (iss)
over fifteen nations were working together to build what is now called the international smile station. -
columbia broke up
columbia broke up after reentering earth's atmosphere in 2003 -
orbiters
the last 3 orbiters continued to be used until their retirement in 2011