[FPSPACE] Phobos First !!

jeoberg at comcast.net jeoberg at comcast.net
Mon Apr 13 15:52:20 EDT 2015


Mars' oblateness and moonlet flexing seem to create and maintain that arrangement, even as the Mars axis precesses [as Earth's does], the moonlets' orbital plane keeps match -- so i'm told by the astrodynamicists. Me, I just steer spaceships. Steering moons and planets, I leave to Another. 

----- Original Message -----

From: "Chris Jones" <clj at panix.com> 
To: fpspace at lists.friends-partners.org 
Sent: Monday, April 13, 2015 2:19:25 PM 
Subject: Re: [FPSPACE] Phobos First !! 

On 4/13/2015 7:46 AM, dstdba wrote: 
> In all probability Phobos is a captured asteroid, so no great deal 
> really. 
> 
> And certainly common sense dictates that the sequence of places in 
> the solar system for humans to visit is Moon, Martian moons, Mars. 

I've certainly heard the theory about Phobos and Deimos being captured 
asteroids, although it's somewhat hard to explain how they ended up in 
low-eccentricity near-equatorial orbits as a result. I also agree 
either or both Martian moons are a good precursor mission for humans to 
undertake prior to a Martian landing, but I don't reject out of hand 
visits to NEOs, though I'd rather see more robotic missions beforehand 
(including close flybys or orbits, landings, and potentially more sample 
returns). 
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