Subject
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- spectrograms of 52 Her1
- spectrographic observations1
- spectrometry1
- spectrophotometry1
- spectroscopic measurements1
- spektroskopie1
- star 53 Arietis1
- star clusters1
- stellar activity1
- stellar astronomy1
- stelární astronomie1
- subordinate lines1
- sunspot groups1
- sunspot regions1
- synthetic spectra1
- telescopes1
- tidal interaction1
- tight system1
- turbulent media1
- twin telescopes1