Astronauts Explore Space
astronauts explore space near Earth
- They take air, water, and food with them.
- space travel requires careful planning.
- space craft needs powerful rockets and giant fuel tanks to lift the weight up against gravity
- equipment needs to be well designed and maintained
- astronauts must get use to special enviroment in space
- weightless condition because they are falling in space at same rate as space craft
- The race to the moon was driven by the rivalry between the U.S. and the Soviets.
- In 1957 the Soviets were the first to launch an artificial satellite into orbit.
- In 1961 the Soviets sent the first human into space.
- The NASA program named Apollo was the first to reach the moon in 1969.
- space station- a satellite that people can live and work in
- U.S. and Soviet Union launched the first space station in 1991
- Russia space agency began to work with the U.S. instead of against
- Mir missions help prepare for international space station(ISS)
- ISS is the size of two football fields
-sections are being launched separately and put together in orbit
- ISS construction began in 1998