Labels:text | screenshot | transport OCR: THE EXPLORER PROGRAM A SERIES OF over 50 satellites, the radiation from objects in space, radiation Explorer program started with the around the Earth, the upper layers of the first US satellite, Explorer 1, in 1958, and atmosphere, and the Sun's radiation. continues to provide useful information Recent Explorer craft have flown to scientists today. Explorer satellites through a comet's tail and mapped the have investigated such phenomena as cosmic microwave background radiation. Astronomy EXTREME EXPLORER Telescopes equipment Since 1992, the Extreme detect UV Ultraviolet Explorer has observed sources of high- energy ultraviolet. Antenna Rocket motor ASTRONOMY SATELLITES Among the Explorer series are the Small Astronomy SEE EXPLORER 1 NEXT ALSO Satellites (SAS). KEY DATES
