Komeet: Verskil tussen weergawes
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|Borrelly || {{nowrap|8 × 4 × 4}} || 0,3<ref name=Britt2006/> || 2{{e|13}}
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|Wild || {{nowrap|5,5 × 4 × 3,3}}<ref name=wild2>{{cite web|title=Comet 81P/Wild 2|publisher=The Planetary Society|url=http://www.planetary.org/explore/topics/asteroids_and_comets/wild2.html|accessdate=November 20, 2007|archiveurl=http://web.archive.org/web/20060525163807/http://www.planetary.org/explore/topics/asteroids_and_comets/wild2.html|archivedate=May 25, 2006}}</ref> || 0,6<ref name=Britt2006/> || 2,3{{e|13}}
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In 2009 is bevestig dat die aminosuur glikokol gevind is in die komeetstof wat [[Nasa]] se Stardust-sending versamel het.<ref>{{cite journal |doi=10.1111/j.1945-5100.2009.tb01224.x |title=Cometary glycine detected in samples returned by Stardust |year=2009 |last1=Elsila |first1=Jamie E. |last2=Glavin |first2=Daniel P. |last3=Dworkin |first3=Jason P. |journal=Meteoritics & Planetary Science |volume=44 |issue=9 |pages=1323|bibcode = 2009M&PS...44.1323E }}</ref> In Augustus 2011 is ’n verslag gepubliseer wat op Nasa se bestudering van [[Meteoor|meteoriete]] geskoei was, en daarin is die moontlikheid genoem dat [[DNS]]- en [[RNS]]-komponente (adenien, guanien en verwante organiese molekules) op [[asteroïde]]s en komete gevorm het.<ref name="Callahan">{{cite journal |doi=10.1073/pnas.1106493108 |title=Carbonaceous meteorites contain a wide range of extraterrestrial nucleobases |year=2011 |last1=Callahan |first1=M.P. |last2=Smith |first2=K.E. |last3=Cleaves |first3=H.J. |last4=Ruzicka |first4=J. |last5=Stern |first5=J.C. |last6=Glavin |first6=D.P. |last7=House |first7=C.H. |last8=Dworkin |first8=J.P. |journal=Proceedings of the National Academy of Sciences |volume=108 |issue=34 |pages=13995|bibcode = 2011PNAS..10813995C }}</ref><ref name="Steigerwald">{{cite web |last=Steigerwald |first=John |title=NASA Researchers: DNA Building Blocks Can Be Made in Space |url=http://www.nasa.gov/topics/solarsystem/features/dna-meteorites.html |publisher=NASA |date=8 Augustus 2011 |accessdate=31 Julie 2013}}</ref>
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