The Unified Astronomy Thesaurus

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Color equation original
dcterms modified equal to or less than 2018-09-14T16:46:59Zequal to or more than 2018-09-14T16:46:59Z
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Photometric systems original
Zero-age horizontal branch stars original
dcterms modified equal to or less than 2018-09-14T17:06:42Zequal to or more than 2018-09-14T17:06:42Z
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Horizontal branch stars original
Planetary nebulae original
dcterms modified equal to or less than 2018-09-18T20:41:59Zequal to or more than 2018-09-18T20:41:59Z
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Emission nebulae original
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Planetary nebulae nuclei original
Quasars original
dcterms modified equal to or less than 2018-09-18T20:42:18Zequal to or more than 2018-09-18T20:42:18Z
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Active galactic nuclei original
Supermassive black holes original
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Broad-absorption line quasar original
Double quasars original
Quasar-galaxy pairs original
Radio loud quasars original
Radio quiet quasars original
X-ray quasars original
Intermediate-type stars original
dcterms modified equal to or less than 2018-09-17T19:46:54Zequal to or more than 2018-09-17T19:46:54Z
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Stellar types original
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F stars original
G stars original
Late-type supergiant stars original
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Late-type stars original
Supergiant stars original
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K supergiant stars original
M supergiant stars original
Red supergiant stars original
Solar M coronal region original
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Solar corona original
Stellar M coronal regions original
dcterms created equal to or less than 2018-09-07T22:00:04Zequal to or more than 2018-09-07T22:00:04Z
dcterms modified equal to or less than 2018-09-14T16:49:04Zequal to or more than 2018-09-14T16:49:04Z
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Stellar coronae 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
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