Old Movies

Another movie: galaxy disk as seen from a location similar to the Sun

on digis

Amanda LaPages's movie of a precessing eccentric hole

Planet migration through a self-gravitating planetesimal disk

Alex's simulation of two planets migrating in a disk of 10^4 planetesimals. All force pairs are computed. The x-axis is semi-major axis; the y-axis the eccentricity. The integrator works in democratic heliocentric coordinates so that Pluto sized planetsimal masses can be integrated in single precision floating point. This ran in about 6 hours.