Subject
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- solar active regions2
- solar activity2
- spectroscopy2
- sunspots2
- Česko2
- 1571-16301
- 1945-1
- 1946-1
- Am star 68 Tau1
- Andromeda nebula1
- Ap star 53 Cam1
- Astropis magazine1
- Be phenomenon1
- Be-star 59 Cyg1
- Chandrasekhar models1
- Comet Halley1
- European Space Agency1
- Evropská kosmická agentura (ESA)1
- Gamma-ray sources1
- HIPPARCOS satellite1