Mihos, Chris (11 de enero de 2006). «Mars (1960-1974): Mars 1». Department of Astronomy, Case Western Reserve University. Archivado desde el original el 13 de octubre de 2013. Consultado el 26 de enero de 2014.
discovermagazine.com
Romero, James (30 de septiembre de 2021). «Swarm of Near-Earth Comets Linked to Recent Ice Giant Breakup». Discover. Archivado desde el original el 14 de octubre de 2021. Consultado el 14 de octubre de 2021. «Together, their orbital analysis of bodies increased the complex’s membership from half a dozen to 88. ... The findings are welcomed by those who believe Comet Encke and the other products of this astronomical event are responsible for many of Earth's most violent and consequential impacts over the last 20,000 years.»
Mihos, Chris (11 de enero de 2006). «Mars (1960-1974): Mars 1». Department of Astronomy, Case Western Reserve University. Archivado desde el original el 13 de octubre de 2013. Consultado el 26 de enero de 2014.
Romero, James (30 de septiembre de 2021). «Swarm of Near-Earth Comets Linked to Recent Ice Giant Breakup». Discover. Archivado desde el original el 14 de octubre de 2021. Consultado el 14 de octubre de 2021. «Together, their orbital analysis of bodies increased the complex’s membership from half a dozen to 88. ... The findings are welcomed by those who believe Comet Encke and the other products of this astronomical event are responsible for many of Earth's most violent and consequential impacts over the last 20,000 years.»
