ruby-sphere-0.1.0 released

ruby-sphere is a set of libraries and user interfaces written in Ruby to calculate apparent positions of stars with a moderate accuracy. We are pleased to announce the first release 0.1.0.

The goal of ruby-sphere is to to provide an easy way to plan astronomical observations. The release 0.1.0 contains a set of libraries to plot visibility maps and a sample script to be edited for your own application. Ruby version 1.8.x is recommended. Gnuplot is required to plot visibility maps.