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Bllac image P2155dec

Optical Image of the BL Lac PKS 2155-304

The most variable type of active galaxy, which includes BL Lacertae objects and the most violently variable quasar.[1]

See also BL Lacertae objects, active galaxy and quasar.

References[]

  1. ^ Rees, Martin (ed.) (2008). Universe: The Definitive Visual Guide. Dorling Kindersley Inc. ISBN 9780756636708. 
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