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- 1625-17121
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- Cassini, Giovanni Domenico1
- Earth orientation1
- Geologie. Meteorologie. Klimatologie1
- Hipparcos mission1
- accuracy status1
- artificial satellites1
- astrometrie3
- astrometry[remove]6
- astronomie1
- astronomy1
- fyzika1
- high precision1
- meteors1
- parallax of Mars and the Sun1
- photographic zenith tube (PZT)1