Exploring Space What is out there?.

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Presentation transcript:

Exploring Space What is out there?

Boldly Go…? 1972 – Pioneer 10 1977 - Voyager 1 & 2 Fly past Jupiter and keep going, last transmission January 2003 1977 - Voyager 1 & 2 Left the solar system and still transmitting Golden record with many different sounds on it

Models of Planetary Motion Geocentric – earth centred Caused retrograde motion = certain planets moved backward for a few months in route across sky. Heliocentric – sun centred 500 BCE but accepted in 1530 – Copernicus Orbital Radius and Elliptical Orbits brought change

Models of Planetary Motion Orbital Radius – planet`s distance from the sun Galileo Galilei furthered this discussion in the 1600s Elliptical Orbits Perihelion – nearest the sun Aphelion – furthest from the sun

Benefits of Space Travel ”seeing the earth” – earthrise, Apollo 8, 1968 Transport – rocket powered technologies International Space Station Products Dehydrated food, antibacterial water filter, miniaturized computers and robotics Satellites Communications, Tracking devices, Digital Imaging, Real time imaging

Challenges to Space Exploration Travel – safety, debris Living Physical environment Vacuum, no air, no water, cosmic rays, radiation Confined living Psychological problems Microgravity – condition in which the gravitational forces that act on a mass are greatly reduced. Heart, muscle, bones, red blood cells How can this be addressed? p. 371

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