>>> import ephem >>> mars = ephem.Mars() >>> mars.compute('2007/10/02 00:50:22') >>> print mars.ra, mars.dec 6:05:56.34 23:23:40.0 >>> ephem.constellation(mars) ('Gem', 'Gemini') Since its first release in 1998, PyEphem has given Python programmers the ability to compute planet, comet, asteroid, and Earth satellite positions. It wraps the “libastro” C library that powers the XEphem astronomy appli