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Hubble Uncovers Smallest Moons Yet Seen Around Uranus
C. F. Leon wrote: There are OTHER sources than Google. Any good astronomy text would probably give you the answer. I'm building a library (far too slowly as I am not wealthy ) Got any recommendations? Hop http://clowder.net/hop/index.html |
#12
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Hubble Uncovers Smallest Moons Yet Seen Around Uranus
Hop David writes:
Gordon D. Pusch wrote: Hop David writes: [...] Do Uranus' moons lie in her equatorial plane? Yes. Tidal friction tends to damp out an inner moon's orbital inclination relative to the planetary equator on timescales short compared to the lifetime of the solar system. High orbital inclination satellites usually have fairly large orbital radii, and are generally thought to be relatively recent "captures." (One exception to this is if their inclinations are being "forced" by some orbital resonance.) At first I had thought Uranus and her moons must have formed from a subdisk perpendicular to the solar system. But I guess if a later event had knocked Uranus' axis off kilter, the moons would've moved into her equatorial plane over a short time. Yes, that is correct. BTW, Uranus [Greek "Ouranos," God of the Sky, and Kronos' (Saturn's) father] was a "him," not a "her." -- Gordon D. Pusch perl -e '$_ = \n"; s/NO\.//; s/SPAM\.//; print;' |
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