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Space Exploration Unit Outline Our next unit of study will focus on space exploration and the technology involved in the study of space environments. Key Questions: How have humans attained a presence in space? What technologies have been developed, based on what scientific ideas? How has the development of space technologies contributed to the exploration, use and understanding of space? What are the benefits to Earth from space technologies and exploration? Key Terms: Satellites Frame of reference Geocentric Heliocentric Celestial bodies Constellations Planets Telescope Objective lens Ocular lens Eye piece Resolving power Refracting Reflecting Ellipse Adaptive optics Triangulation Astronomical unit (AU) Light-year Rocket Staged rocket Inner planets Outer planets Orbits Alt-az coordinates Astrolabe Compass Universal gravitation Spectrum Spectral lines Spectroscope Spectroscopy Diffraction grating Spectral analysis Doppler effect Red-shifted Electromagnetic radiation Radio astronomy Radio telescopes Radio objects Interferometry VLBI Artificial satellite Low Earth orbit Geosynchronous orbit GPS microgravity