BOTEC A simple astrophysics and orbital mechanics simulator BOTEC is intended as a simple but useful calculator to assist with making astrophysical, orbital mechanics, and space navigation calculations. As the origin of the acronym applies, BOTEC is more of a "back-of-the-envelope calculator" rather than an industrial-strength calculator, although this may change in the future. BOTEC is primarily intended for people familiar with physics and Python, and as such is unlikely to be useful to the average enduser. BOTEC really consists of two parts: The BOTEC software, which knows what to do with the data, and the Solar System data itself, which is represented in a large data file (a Python pickle, actually). This is deliberately modularized so that the Solar System data BOTEC uses can be updated independently of thet software, and also that alternative data files (e.g., hypothetical stellar systems for fictional purposes) can be supported. All values are strictly in SI units. http://www.alcyone.com/botec/botec-latest.tar.gz Erik Max Francis 1fdcbea19c4179a4b98dfcc884f7115b0e237345 0.3