| 1 | 52,172 | 19,775 | ephem | Ruby implementation of the parsing and computation of ephemerides from NASA/JPL Develop... |
| 2 | 92,221 | 25,816 | astronoby | Astronomy and astrometry Ruby library for astronomical data and events. |
| 3 | 103,535 | 28,078 | iers | Access to Earth orientation parameters and time scale values from the International Ear... |
| 4 | 167,695 | 42,533 | horologium | Horologium is a Ruby library dedicated to scientific time: the time scales, high-precis... |
| 5 | 179,622 | 87,723 | skymap | Skymap is a Ruby library for generating maps of the sky. |
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