Spacial_Anomaly

After a quick search it seems a configuration where a binary asteroid is interrupted (tidal force) and one of them is captured is favored by physists (or at least a lot looked at). Also a circumplanetary disk could slow down the asteroid/them moon and lower their orbit (i.e. here: ADS)

Probably by a gravity assist (desist?) (or more generally some N-body-interaction)

Another thing you have to look out for are numerical approximation errors (because you have a time steps and not a continuous time development, also depending on the method used), so orbits that should be stable "degenerate" over time.

Well, we only can apply the point-mass-approximation for (near)spherically symmetic objects ( http://en.wikipedia.org/wiki/Shell_theorem ). That's why we can assume it in KSP because planets are spherically symmetric.

The big tidal waves on Earth are in fact resonance effects, the real tidal force of the moon would only account for 12 cm or so. So on Laythe the mean sea level of the oceans would be a few cm or meter (would have to look up the parameters) higher on the planet facing side and the (well not planet facing, insert fitting word) site. Edit: A (very crude) formula for when a moon is destroyed by it's planet is given by R_s< 2.52*R_M*sqrt(rho_M/rho) where R_M and rho_M are the radius and density of the parent body R_s the distance to the moon and rho the density of the moon. Is the distance smaller the moon will de pulled apart or at least there will be strong vulcanism. Source: http://www.geo.physik.uni-goettingen.de/~augp/AGEO3.1.pdf it's in german, the last bit (3.1.6).

From the first Friedmann equation we know da/dt=aH_0*sqrt(Omega_m*a^-3+Omega_Lambda) ignoring all Omegas but the Omega_Lambda (The Omegas are very well known, especially with the recent announcement of PLANCK data, Omega_Lambda~0.73, Omega_m~0.27) we get da/dt=aH_0*sqrt(Omega_Lambda) -> a ~ exp(H_0*sqrt(Omega_Lambda*t) (De-Sitter-space) So if a grows da/dt also grows -> acceleration. P.S. Does this Forum have LaTeX support?

That's because there is a wiki link for everything. Also: http://en.wikipedia.org/wiki/Wikipedia:Researching_with_Wikipedia

Yes. But the peculiar velocity is caused by gravitational interaction. And I agree with you: there's no way around matching your velocity with the target.

I'm not so sure about that, since the Hubble velocity is a property of the space-time and not of the object within, so I'd guess you'd move in comoving coordinates, which aren't affected by the expansion. Also the expansion of the universe doesn't affect gravitational bound objects (much), such like galaxies. The far greater source of differences in velocity would be plain gravity (e.g. Andromeda rushes with 300 km/s in our direction).