Unit D – Space Exploration Lesson 4-4:(sec 2.1) Getting There: Technologies for Space Transport

A. History ancient made using rocket-propelled objects Greeks steam in order to put an object into space, the pull of Earth’s gravity must be overcome Earth’s escape velocity is at least 28 000 km/h 1957 – Russia launches Sputnik, the first artificial satellite slide 1 of 7

B. Rocket Science rockets are propelled using forces for every there is an equal and opposite reaction action slide 2 of 7

rockets have three basic parts: 1. rocket body, fins, engines etc structure and mechanical parts – 2. liquid oxygen and hydrogen, gasoline (makes up most of the mass) fuel – 3. payload – crew cabin, crew, air, water etc. slide 3 of 7

C. Future Technology are engines that use ion drives electrically charged xenon gas xenon is accelerated and emitted as exhaust, causing the rocket to move in the opposite direction than but lasts an weaker thrust chemical fuel extremely long time slide 4 of 7

there is so the vehicle can no friction in space go a long distance on very little fuel are solar sails thin sheets that will move when exposed to solar energy the energy from photons from the sun is used to power the spacecraft and increase its speed is being used as a sail material carbon fibre slide 5 of 7

D. Shuttles, Probes and Stations transport to orbiting spacecraft personnel and equipment shuttles contain instruments for exploring space robotically probes eg) Voyager space probe, Hubble Space Telescope slide 6 of 7

are orbiting spacecraft that space stations allow people to live and work in space for extended periods of time International Space Station http://www.nasa.gov/mission_pages/station/main/iss_top_10.html slide 7 of 7

Assignment Worksheet 5