PRG

(redirected from Polar-ring galaxy)
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AcronymDefinition
PRGPanda Restaurant Group (Rosemead, CA)
PRGParadigm Research Group
PRGPotentiel de Réchauffement Global (French: Global Warming Potential)
PRGParti Radical de Gauche (French: Left Radical Party)
PRGPhotonics Research Group (Georgia Institute of Technology)
PRGPurge
PRGPolar-Ring Galaxy (astronomy)
PRGProgramming
PRGPhilly Roller Girls (roller derby league; Philadelphia, PA)
PRGParis Rollergirls (Roller Derby League; Paris, France)
PRGPeriodontal Research Group (British Society for Dental Research; UK)
PRGPreliminary Remediation Goal
PRGPerformance Reward Grant (UK)
PRGProgramming Research Group (Oxford University)
PRGProgesterone
PRGProject Reference Group (various locations)
PRGPreusser Research Group (various locations)
PRGPeople's Revolutionary Government
PRGPartial Risk Guarantee
PRGProgram Review Group
PRGProvisional Revolutionary Government of South Vietnam
PRGPollution Research Group
PRGPontine Respiratory Group
PRGPressure Relief Group (12-step support groups)
PRGPhoto-Reconnaissance Group
PRGProgram Representation Graph
PRGProduct Release Group
PRGPath Redundant Graph
PRGPrague, Czech Republice - Ruzyne (Airport Code)
References in periodicals archive ?
Caption: NGC 660 Situated some 43 million light-years away, this Seyfert is a fine example of a polar-ring galaxy. It's not yet known how these objects came to be: One scenario postulates the merging of two galaxies at a right angle, while another has the host galaxy tidally stripping a passing gas-rich spiral galaxy.
All the action appears in a single frame, with the stunning polar-ring galaxy NGC 660 as the focus of attention.
But NGC 660, which lies about 40 million light-years distant toward the direction of Pisces the Fishes, is the only polar-ring galaxy known with what is called a late-type lenticular galaxy as its host.
A polar-ring galaxy actually is a member of the S0 class of galaxies--a cross between a spiral and an elliptical, with mostly old stars and very little gas--surrounded by a circle of stars, gas and dust.
Photo: Negative image of polar-ring galaxy ESO 415-G26.
Photo: Polar-ring galaxy NGC 4650A has a central spindle of old stars and a nearly edge-on ring of gas, dust and young stars that extends above and below the disk.
A polar-ring galaxy exhibits a disk or ring of gas, dust, and stars that's nearly perpendicular to the disk of the host galaxy.
image of the polar-ring galaxy NGC 4650A in Centaurus (page 26).
This beautiful Hubble Space Telescope image of NGC 4650A, the prototypical polar-ring galaxy nearly 130 million light-years away in Centaurus, shows its detailed structure.
Size Notes NGC 4622 12.4 1.7' x 1.6' Spiral arms leading rotation NGC 4650 11.6 2.8' x 2.8' Part of the Centaurus Chain NGC 4650A 13.3 1.6' x 0.8' Polar-ring galaxy NGC 4696 10.4 4.5' x 3.2' Part of Abell 3526 NGC 4709 10.9 2.4' x 2.0' Part of Abell 3526 NGC 5215 12.9 1.1' x 0.5' Interacting pair NGC 5220 12.0 2.3' x 0.7' Bisecting dust lane IC 4296 10.6 2.8' x 2.8' Part of Abell 3565 IC 4329 11.3 3.4' x 1.9' Part of Abell 3574 IC 4329A 13.0 1.4' x 0.4' Seyfert galaxy NGC 5291 14.1 1.2' x 0.8' Seashell Galaxy nearby STEVE GOTTLIEB is a regular Deep-Sky Notebook contributor.