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Glossary of chat acronyms & text shorthand. 2014.
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Einstein Observatory — (HEAO 2) was the first fully imaging X ray telescope put into space and the second of NASA s three High Energy Astrophysical Observatories. Named HEAO B before launch, the observatory s name was changed to honor Albert Einstein upon its… … Wikipedia
HEAO Program — The High Energy Astronomy Observatory Program was a NASA program of the late 1970s and early 1980s that included a series of three large low Earth orbiting spacecraft for X ray and Gamma Ray astronomy and Cosmic Ray investigations. After launch,… … Wikipedia