[1] The Cloverleaf Quasar is a gravitational-ally lensed quasar which contains a substantial dust content. This also infers that the quasar contains a large amount of gas as well. The gravitational field of at least one if not more foreground galaxies was bent in such a way that it magnified the light from the quasar to produce more than one image. This magnification can be the result of the X-rays in this quasar coming from a small section of its black hole and the optical light comes from a different area. This phenomenon of bending light in order to detect astronomical objects is called gravitational microlensing [2] AjBongiorno (talk) 16:19, 5 December 2016 (UTC)
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{{cite web}}: Missing or empty|title=(help); Missing or empty|url=(help)CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link) - ^ G. Chartas et al. 2004 Astrophys. J. 606, 78.
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