PETRA

Petra

Petra is a music group regarded as a pioneer of the Christian rock and contemporary Christian music genres. Formed in 1972, the band took its name from the Greek word for "rock". Though formally disbanding in 2006, incarnations of Petra have played reunion shows in the years since and released an album in November 2010. In 2013 The retirement performers with a new drummer Cristian Borneo reunited and recorded a new song 'Holy is your name' as well as going back on tour.

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PETRA

PETRA is one of the particle accelerators at DESY in Hamburg, Germany. From 1978 to 1986 it was used to study electron–positron collisions. It was here that the TASSO collaboration found the first direct evidence for gluons in three jet events. The modification called PETRA-II is a source of high-energy synchrotron radiation and also a pre-accelerator for the HERA. Started in 2007, an upgrade has been converting it to PETRA-III, which is a high intensity source for synchrotron radiation.

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petra

Noun

  1. stone, a weight equal to 14 pounds.


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