GRA

(redirected from gamma-ray astronomy)
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AcronymDefinition
GRAGranby (Amtrak station code; Granby, CO)
GRAGhana Revenue Authority (Accra, Ghana)
GRAGetting Ready for Algebra (education)
GRAGraphic Arts
GRAGlucocorticoid Remediable Aldosteronism (disorder)
GRAGrande Raccordo Anulare (circular highway surrounding Rome, Italy)
GRAGreen Restaurant Association (Boston, Massachusetts)
GRAGraphics File
GRAGrid Reference Architecture
GRAGun Runners' Arsenal (video game)
GRAGraduate Research Assistant
GRAGraduate Research Assistantship
GRAGeorgia Research Alliance
GRAGovernment Residential Area (Nigeria)
GRAGroundwater Recharge Area
GRAGlobal Research Alliance on Agricultural Greenhouse Gases
GRAGuyana Revenue Authority (Georgetown, Guyana)
GRAGolden Reel Award (various organizations)
GRAGuestroom Attendant (various companies)
GRAGarda Representative Association (Dublin, Ireland)
GRAGeophysical Research Abstracts (open access publication)
GRAGas Regulatory Authority (various locations)
GRAGroundwater Resources Association of California (also seen as GRAC)
GRAGo Right Ahead
GRAguaranteed retirement account
GRAGlobal Renaissance Alliance
GRAGeneral Rate Application (NTPC, Canada)
GRAGovernment Relations Analyst
GRAGenootskap van Regte Afrikaners (Dutch)
GRAGroup Retirement Annuity
GRAGarcia Research Associates (Burbank, CA)
GRAGamma-Ray Astronomy
GRAGenealogy Research Associates (Utah)
GRAGovernment Reserved Area (Nigeria)
GRAGamma Ray Attenuation
GRAGellman Research Associates
GRAGovernment Retirement Account
GRAGamma-Ray Astrophysics
GRAGhost Rider Annual (Marvel comics)
GRAGypsum Resources Australia
GRAGroup Reset Acknowledgment
GRAGeorgia Racquetball Association
GRAGeographical Routing Algorithm
GRAGeneral Risk Assessment
GRAGlobal Real Analytics, LLC
GRAGovernment Reference Architecture
GRAGeorgia Rehabilitation Association
GRAGoffstown Residents Association (Goffstown, NH)
GRAGenerale Raad Van Advies (Dutch: General Council of Advice; Netherlands)
GRAGeochemistry Research Association (Japan)
GRAGirls Rodeo Association, Inc.
GRAGeneralized Rytov Analysis
GRAGlobal Readiness Assistance
GRAGovernment Report Abstracts
GRAGovernment Research Announcement
GRAGreat Race All (online racing)
GRAGyro Reference Assembly
GRAGovernmental and Regulatory Agency
References in periodicals archive ?
The first gamma-ray astronomy satellite was Explorer 11, launched in 1961.
Beginning in the 1970s, gamma-ray astronomy launched a comeback.
Aharonian et al., "Design concepts for the Cherenkov Telescope Array CTA: an advanced facility for ground-based high-energy gamma-ray astronomy," Experimental Astronomy, vol.
Development, construction and installation of a mechanical telescopic structure for a 100-ton prototype of an IACT telescope with a mirror diameter of 23 Mo for the CTA project (gamma-ray astronomy).
The rise of radio astronomy also helped awaken researchers to the need to develop instruments capable of operating beyond the range of visible light and helped inaugurate the era of microwave, infrared, ultraviolet, X-ray, and gamma-ray astronomy.
In 1962 radioastronomy had already developed alongside optical astronomy, but X-ray astronomy hardly existed, and such exotica as gamma-ray astronomy and neutrino astronomy were hopes or promises rather than science.
Forty years ago, the term "gamma-ray astronomy" was an oxymoron.
To find the answer, I selected 409 articles published from 1987 to 1996 on three astronomical topics (gamma-ray astronomy, supernovae, and Martian geosciences) by Sky & Telescope, Science News, New York Times, United Press International, and newspapers from five midsize cities.
gov) is head of the gamma-ray astronomy group at NASA's Marshall Space Flight Center and was principal investigator of the Compton Gamma Ray Observatory's BATSE instrument.
What the Hubble Space Telescope (the first Great Observatory) and the Chandra X-ray Observatory (the third) are doing for optical and X-ray astronomy, Compton has done for gamma-ray astronomy. (The Space InfraRed Telescope Facility, or SIRTF, Part Four in the Great Observatory story, won't be launched until 2001.) Compton provided NASA with an unprecedented chunk of the electromagnetic pie, covering a broader range in energy than any other observatory - six orders of magnitude, nearly a million times wider than the visible portion of the spectrum.