An Evolving View of Saturn's Dynamic Rings
Publication date: 19 March 2010
Authors: Cuzzi, J.N. et al.
We review our understanding of Saturn's rings after nearly 6 years of observations by the Cassini spacecraft. Saturn's rings are composed mostly of water ice but also contain an undetermined reddish contaminant. The rings exhibit a range of structure across many spatial scales; some of this involves the interplay of the fluid nature and the self-gravity of innumerable orbiting centimeter- to meter-sized particles, and the effects of several peripheral and embedded moonlets, but much remains unexplained. A few aspects of ring structure change on time scales as short as days. It remains unclear whether the vigorous evolutionary processes to which the rings are subject imply a much younger age than that of the solar system. Processes on view at Saturn have parallels in circumstellar disks.Link to publication
An Evolving View of Saturn's Dynamic Rings (Saturn's Dynamic Rings) ni kitabu cha kwanza cha kihistoria kilichochapishwa mnamo Machi 19, 2010 na kilichoandikwa na J.N. Cuzzi. et al. "Kama ilivyoelezwa hapo juu, ""Mzunguko wa Saturn"" ulijulikana kwa miaka sita ya uchunguzi wa chombo cha angani cha Cassini." Pete za Saturn zimefanyizwa hasa na barafu ya maji lakini pia zina uchafuzi usiojulikana wa rangi nyekundu. Vipande hivyo vina muundo tofauti katika vipimo vingi vya anga; baadhi ya mambo haya yanahusisha mwingiliano wa asili ya umajimaji na nguvu ya uvutano wa chembe zisizo na hesabu zinazozunguka kwa ukubwa wa sentimeta hadi mita, na athari za miezi kadhaa ya pande zote na iliyoingizwa, lakini mengi bado hayajaelezwa. Sehemu chache za muundo wa pete hubadilika kwa muda mfupi kama siku. Haijulikani wazi kama mchakato wa mageuzi unaoendelea kwa nguvu ambayo pete hizo zinakabiliwa na umri mdogo kuliko ule wa mfumo wa jua. Mchakato juu ya mtazamo katika Saturn kuwa sambamba katika disks circumstellar.Link kwa kuchapishwa