Topic 2.1 - Planetary Systems 0.0 / 5 ? AstronomyPlanetary SystemsGCSEEdexcel Created by: goldstar3Created on: 05-06-18 19:14 N) Satellite system of Mars Phobos and Deimos irregular in shape tens of kms in size heavily cratered composition similar to asteroid believed to be captured bodies from asteroid belt 1 of 3 N) Satellite system of Neptune Triton - largest Moon Revolves in different direction to one that Neptune spins in only large body to do so frozen surface of nitrogen, CO2 and methane Lacks craters Geysers erupt from surface Dark Proteus is second largest irregular satellite orbits in plane of equator and same sanse as planet's spin formed around same time Neried takes almost a year to orbit Neptune Suggests it is a captured Kuiper Belt Object 2 of 3 O) Ring Systems Particles of ice, rock and dust Range from micrometres to metres Extremely wide Less than 1.5km thick Some are incomplete - Uranus and Neptune Possible rings are formed from debris of an impact Jupiter has dark, dusty rings Saturn has icy, highly reflective rings 3 of 3
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