The Space Guidebook

Air Force altitude America's areas asteroids astronaut astronomers Atlas Atlas missile atoms believe bright canals century clouds clusters comets constellation cosmic craters crews dark diameter discovered distance earth earth's atmosphere eclipse Explorer extremely feet fired Fred Hoyle galaxies gases giant Hale telescope heat hundred hydrogen ICBMs instrument Jupiter launching light light-years lunar Mars Martian Mercury meteorites meteors miles a second million miles minutes missile moon moon's surface Mount Wilson night nuclear Observatory Ocean optical orbit outer space oxygen Palomar particles payload weight pilot planetary Pluto Project Mercury pull of gravity radar radiation radio telescopes range rays rocket rocket ship rotation Satel satellite Saturn Scientific payload scientists solar system SPACE PROBES space ship space travelers speed spot stage stars stations sun's sunspots temperature theory tion Total weight United universe Uranus vapor Venus Walter Baade weight in orbit