optical electromagnetic mechanical waves reflecting telescope radio telescopes rocket refracting telescope radio waves speed Light
dish reflectors reflecting visible light concave observatories electromagnetic spectrum Hubble Telescope atmosphere
satellite Armstrong orbit Project Apollo Voyager Glenn Project Gemini space probe
atmosphere Mars Galileo Sputnik 1 rocket Earth Mercury
satellite reflecting orbit Project Apollo refracting Space Shuttle space probe Project Gemini
observatory spectrum rocket space station Sputnik 1 Mars
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