Browsing Institutt for teoretisk astrofysikk by Author "Oppegaard, Christine"
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Oppegaard, Christine (Master thesis / Masteroppgave, 2007)Gravitational lensing has played an important role in cosmology since the discovery of the first gravitational lensing system in 1979 (Walsh et al.), where the quasar QSO 0957+561 can be seen in two images. Such multiple ...