lecture17 - Saturn system Gas giant smaller than Jupiter...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Extraterrestrial Life: Spring 2008 Saturn system Gas giant: smaller than Jupiter… about 95 Earth masses • rings: extend from 6,000-120,000 km above the equator of Saturn… made up of mostly small icy particles • orbital radius is 9.6 AU - planet formed in a still colder part of the protoplanetary disk in which hydrocarbon ices as well as water ice were present Extraterrestrial Life: Spring 2008 Satellites of Saturn Large number ~60 moons Enceladus : 500km diameter moon, orbital radius 240,000km Titan : 5150km diameter - second largest moon in the Solar system after Ganymede • orbital radius 1.2 million km • orbital period (Saturn) 16 days • orbital period of Saturn ~30 years Solar flux ~1% of value at Earth Temperature in absence of greenhouse effect ~80K Extraterrestrial Life: Spring 2008 Both satellites are of interest for astrobiology: Enceladus : possible existence of liquid water in the subsurface - plumes mean that it is easily accessible to measurements! Titan : no evidence for liquid water, but many similarities to the early Earth - may provide information on the chemistry that preceded life on Earth The ESA Huygens probe landed on Titan early in the Cassini mission
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern