The gem is to provide a central place for pushing in a date or timestamp of a birthdateand getting astrology data.
In rails you can add it to the Gemfile:
gem 'astrology'
Outside of a rails
gem install astrology
Get an astrology data by passing in a timestamp of a string
Astrology.get_data('10/20/2010')
Or you can pass it a timestamp
Astrology.get_data(Time.now)