| 1 | 50,499 | 16,274 | ephem | Ruby implementation of the parsing and computation of ephemerides from NASA/JPL Develop... |
| 2 | 90,118 | 17,212 | astronoby | Astronomy and astrometry Ruby library for astronomical data and events. |
| 3 | 98,699 | 17,212 | iers | Access to Earth orientation parameters and time scale values from the International Ear... |
| 4 | 162,159 | 23,104 | horologium | Horologium is a Ruby library dedicated to scientific time: the time scales, high-precis... |
| 5 | 173,347 | 31,716 | skymap | Skymap is a Ruby library for generating maps of the sky. |
| 6 | 197,944 | 31,716 | miqat | Reserves the name of Miqat, a library of high-precision Islamic prayer times built on A... |
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