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Exploring Space add clip of movie gravity? Weeeeee! (2.1) The Thrill of Exploring Humans, by nature, want and need to explore Need to understand Find new resources Explore new areas of Earth When Earth wasn’t enough, we ventured into space! More difficult – why? Far $$ Extreme cold and danger Need ways to explore space from Earth Telescopes Telescopes: Use electromagnetic radiation Electromagnetic Radiation = energy emitted, traveling as a wave Travels at the speed of light Telescopes Traditional telescopes (optical) detect visible light (small part of the spectrum) Radio telescopes detect non-visible wavelengths Can be used on cloudy days or at night Only small portions of the electromagnetic spectrum from space can reach Earth’s surface Telescopes are needed above the atmosphere “MOST” – Canada’s Space Telescope Microvariability and Oscillations of STars Launched in 2003 Purpose: to study stars similar to the sun Was expected to study 10 stars and last 1 year Has provided data on over 1500 stars and is expected to last until 2015 Orbiters and Landers Planetary orbiters travel to other planets and take very detailed observations. Orbit another planet and take high-res pictures Short life expectancies (2-3 yrs) Planetary landers can study weather and the ground Can’t move around – small environmental sample Shorter life expectancies (few months) Risky business! Mars Climate Orbiter – Yikes! Satellites Def: Human-made object or vehicle that orbits a celestial body Communication GPS Satellites TV, Internet, weather reports, telephone More than 2 dozen are spread above Earth Remote-sensing Satellites Low orbiting – survey Earth quickly Useful for meteorology, climatology, oceanography Satellites “Sputnik” – 1st artificial satellite put into orbit Soviet Union Oct 4, 1957 Burned up in the atmosphere 5 months later Canada launched the first commercial satellite For the CBC on Nov 9, 1972 – called: Anik 1 For remote communities International Space Station (ISS) Partnership between many countries to share costs Orbits only 360km above Earth! Space-based lab Microgravity Canadarm, Canadarm2 and Dextre Used on NASA’s space shuttles to help with construction of the ISS http://www.youtube.com/ watch?v=ck76yL_s30s