That degree of eccentricity required is well within the range of possible orbits for Mars 4 billion years ago, Palumbo says. (sciencedaily.com)
Now Matthew Holman and Matthew Payne, two astronomers from the Harvard - Smithsonian Center for Astrophysics, have taken the idea a step further by analysing the Cassini data for multiple possible orbits instead of just one. (newscientist.com)
In between, in Belbruno's description, lies a «fuzzy boundary» where the orbits attached to Earth and those attached to the moon mix in an impossible tangle — a tightly woven tapestry of dynamics whose threads are an infinity of different possible orbits. (discovermagazine.com)