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Captured Moons, How the heck do planets capture moons>
Chmee
post Aug 23 2005, 06:33 PM
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A question that has bugged me for a long time is how planets capture asteroids, etc into an orbit. My understanding of orbital dynamics is that a body approaching a planet would need to be "braked" in order to be captured into orbit. In the same manner that our space probes use their rockets to slow them down enough or they would shoot past.

So for moons like Triton, Deimos, and Phobos (as well as the small, distant moons of Jupiter/Saturn) how were they captured? What provided the braking?
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Posts in this topic
- Chmee   Captured Moons   Aug 23 2005, 06:33 PM
- - dvandorn   Gravity. In specific, gravity from a third (and e...   Aug 23 2005, 06:42 PM
|- - ljk4-1   QUOTE (dvandorn @ Aug 23 2005, 01:42 PM)Gravi...   Aug 23 2005, 07:24 PM
|- - Bob Shaw   QUOTE (ljk4-1 @ Aug 23 2005, 08:24 PM)Th...   Aug 23 2005, 08:39 PM
- - helvick   QUOTE (Chmee @ Aug 23 2005, 07:33 PM)My under...   Aug 23 2005, 07:13 PM
|- - ElkGroveDan   never mind   Mar 26 2006, 07:19 PM
- - tedstryk   QUOTE (Chmee @ Aug 23 2005, 06:33 PM)A questi...   Aug 23 2005, 07:14 PM
- - dvandorn   I wonder if it's friendly? -the other Doug   Aug 24 2005, 08:21 AM
- - abalone   QUOTE (Chmee @ Aug 24 2005, 05:33 AM)A questi...   Aug 24 2005, 09:18 AM
- - BruceMoomaw   If the relative velocity of the planet and the pot...   Aug 24 2005, 10:52 AM
|- - Bob Shaw   QUOTE (BruceMoomaw @ Aug 24 2005, 11:52 AM)If...   Aug 24 2005, 11:17 AM
|- - ljk4-1   QUOTE (Bob Shaw @ Aug 24 2005, 06:17 AM)Bruce...   Aug 24 2005, 01:31 PM
- - Rob Pinnegar   QUOTE (Chmee @ Aug 23 2005, 12:33 PM)A questi...   Aug 25 2005, 05:20 AM
- - PhilCo126   Gravity is certainly the answer here... The large ...   Dec 28 2005, 10:11 PM
- - Bob Shaw   QUOTE (PhilCo126 @ Dec 28 2005, 11:11 PM)Grav...   Dec 29 2005, 12:56 AM
- - AlexBlackwell   QUOTE (Bob Shaw @ Dec 29 2005, 12:56 AM)Phobo...   Dec 29 2005, 01:19 AM
|- - Bob Shaw   Alex: Absolutely! Bob Shaw   Dec 29 2005, 01:28 AM
|- - tasp   QUOTE (AlexBlackwell @ Dec 28 2005, 07:19...   Mar 26 2006, 07:05 PM
- - RNeuhaus   QUOTE (Bob Shaw @ Dec 28 2005, 07:56 PM)Phobo...   Dec 29 2005, 03:43 AM

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