The Unified Astronomy Thesaurus

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Main sequence stars original
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Stellar evolutionary types original
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Zero-age main sequence stars original
Horizontal branch stars original
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Stellar evolutionary types original
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Extreme horizontal branch stars original
Zero-age horizontal branch stars original
Emission line stars original
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Stellar types original
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T Tauri stars original
Be stars original
Early-type emission stars original
FU Orionis stars original
Flash stars original
Gamma Cassiopeiae stars original
H-alpha stars original
Luminous blue variable stars original
Me stars original
Mira variable stars original
S Doradus stars original
Symbiotic binary stars original
X-ray stars original
Z Andromedae stars original
Protostars original
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Interstellar medium original
Stellar types original
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Bok globules original
Cocoon stars original
Cometary nebulae original
Protoplanetary disks original
Young stellar objects original
Star clusters original
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Stellar astronomy original
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Globular star clusters original
Moving clusters original
Open star clusters original
Protoclusters original
Stellar associations original
Young massive clusters original
Sunspots original
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Solar active regions original
Solar physics original
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Delta sunspots original
Ephemeral active regions original
Maunder minimum original
Sunspot flow original
Sunspot groups original
Sunspot number original
Wilson effect original
Telescopes original
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Astronomical instrumentation original
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Automated telescopes original
Gamma-ray telescopes original
Grazing incidence telescopes original
Ground telescopes original
Meridian circles original
Neutrino telescopes original
Optical telescopes original
Radio telescopes original
Solar telescopes original
Space telescopes original
Telescope mounts original
Wide-field telescopes original
T Tauri stars original
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Emission line stars original
Irregular variable stars original
Young stellar objects original
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Classical T Tauri stars original
Weak-line T Tauri stars original
Astrophysical masers original
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Extragalactic astronomy original
Interstellar medium original
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Hydroxyl masers original
Megamasers original
Silicon monoxide masers original
Water masers original
Flare stars original
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Eruptive variable stars original
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FU Orionis stars original
R Coronae Borealis variable stars original
RS Canum Venaticorum variable stars original
Red dwarf flare stars original
UV Ceti stars original