1. 8.1 Exploring Space Homework: Page 332 # 1, 6, 7, 8

2. Key Concepts: There are 2 basic types of optical telescopes. Refracting telescopes collect light using a lens and Reflecting telescopes collect light using mirrors. There are 2 basic types of optical telescopes. Refracting telescopes collect light using a lens and Reflecting telescopes collect light using mirrors. There are also telescopes that detect non-visible radiation. There are also telescopes that detect non-visible radiation. Alternatives to human exploration of space are telescopes, planetary orbiters, landers and satellites. Alternatives to human exploration of space are telescopes, planetary orbiters, landers and satellites.

3. There are hazards, risks, benefits and ethical issues related to exploring space and developing space technology. There are hazards, risks, benefits and ethical issues related to exploring space and developing space technology. The Canadian government, Canadian companies, and individual Canadians have contributed to the exploration of space in many different ways. The Canadian government, Canadian companies, and individual Canadians have contributed to the exploration of space in many different ways.

4. The Thrill of Exploring Humans, by nature, want and need to explore Humans, by nature, want and need to explore Need to understand Need to understand Find new resources Find new resources Explore new areas of Earth Explore new areas of Earth When Earth wasn’t enough, we When Earth wasn’t enough, we ventured into space! More difficult More difficult Far Far $$ $$ Extreme cold and danger Extreme cold and danger Need ways to explore space from Earth Need ways to explore space from Earth

5. Telescopes Telescopes: Use electromagnetic radiation Telescopes: Use electromagnetic radiation Electromagnetic Radiation = energy emitted, Electromagnetic Radiation = energy emitted, traveling as a wave Travels at the speed of light Travels at the speed of light

6. Telescopes Traditional telescopes (optical) detect visible light (small part of the spectrum) Traditional telescopes (optical) detect visible light (small part of the spectrum) Radio telescopes detect non-visible wavelengths Radio telescopes detect non-visible wavelengths Can be used on cloudy days or at night Can be used on cloudy days or at night Only small portions of the electromagnetic spectrum from space can reach Earth’s surface Only small portions of the electromagnetic spectrum from space can reach Earth’s surface Telescopes are needed above the atmosphere Telescopes are needed above the atmosphere

7. “MOST” – Canada’s Space Telescope Microvariability and Oscillations of Stars Microvariability and Oscillations of Stars Launched in 2003 Launched in 2003 Purpose: to study stars similar to the sun Purpose: to study stars similar to the sun Was expected to study 10 stars and last 1 year Was expected to study 10 stars and last 1 year Has provided data on over 1500 stars and is expected to last until 2015 Has provided data on over 1500 stars and is expected to last until 2015

8. Orbiters and Landers Planetary orbiters travel to other planets and take very detailed observations. Planetary orbiters travel to other planets and take very detailed observations. Orbit another planet and take high-resolution pictures Orbit another planet and take high-resolution pictures Short life expectancies (2-3 yrs) Short life expectancies (2-3 yrs) Planetary landers can study weather and the ground Planetary landers can study weather and the ground Can’t move around – small environmental sample Can’t move around – small environmental sample Shorter life expectancies (few months) Shorter life expectancies (few months)

9. Satellites Definition: Human-made object or vehicle that orbits a celestial body Definition: Human-made object or vehicle that orbits a celestial body Communication Communication TV, Internet, weather reports, telephone TV, Internet, weather reports, telephone GPS Satellites GPS Satellites More than 2 dozen are spread above Earth More than 2 dozen are spread above Earth Remote-sensing Satellites Remote-sensing Satellites Low orbiting – survey Earth quickly Low orbiting – survey Earth quickly Useful for meteorology, climatology, oceanography Useful for meteorology, climatology, oceanography

10. Satellites “Sputnik” – 1 st artificial satellite put into orbit “Sputnik” – 1 st artificial satellite put into orbit Soviet Union Soviet Union Oct 4, 1957 Oct 4, 1957 Burned up in the atmosphere 5 months later Burned up in the atmosphere 5 months later Canada launched the first commercial satellite Canada launched the first commercial satellite For the CBC on Nov 9, 1972 – called: Anik 1 For the CBC on Nov 9, 1972 – called: Anik 1 For remote communities For remote communities

11. International Space Station (ISS) Partnership between many countries to share costs Partnership between many countries to share costs Orbits only 360km above Earth! Orbits only 360km above Earth! Space-based lab Space-based lab Microgravity Microgravity Canadarm, Canadarm2 and Dextre Canadarm, Canadarm2 and Dextre Used on NASA’s space shuttles to help with construction of the ISS Used on NASA’s space shuttles to help with construction of the ISS