The Unified Astronomy Thesaurus

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Zero-age main sequence stars original
dcterms modified equal to or less than 2018-09-13T14:54:43Zequal to or more than 2018-09-13T14:54:43Z
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Main sequence stars 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
Young stellar objects original
dcterms modified equal to or less than 2018-09-13T16:59:23Zequal to or more than 2018-09-13T16:59:23Z
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Protostars original
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FU Orionis stars original
Herbig Ae/Be stars original
Herbig-Haro objects original
T Tauri stars original
Young disk Cepheid variable stars original
dcterms modified equal to or less than 2017-01-23T19:43:35Zremove minimum value filter
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Cepheid variable stars original
Yerkes classification original
dcterms modified equal to or less than 2018-09-07T22:19:01Zequal to or more than 2018-09-07T22:19:01Z
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Stellar classification original
Yellow straggler stars original
dcterms modified equal to or less than 2018-09-13T16:58:11Zequal to or more than 2018-09-13T16:58:11Z
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Stellar evolutionary types original
Xenobiology original
dcterms modified equal to or less than 2018-09-20T14:28:46Zequal to or more than 2018-09-20T14:28:46Z
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Astrobiology original
definition "the study of synthesizing and manipulating biological devices and systems" - Wikipedia
X-ray transient sources original
dcterms created equal to or less than 2017-03-20T21:13:51Zequal to or more than 2017-03-20T21:13:51Z
dcterms modified equal to or less than 2018-09-06T16:23:46Zequal to or more than 2018-09-06T16:23:46Z
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X-ray sources original
Transient sources original
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X-ray bursters original
X-ray sources original
dcterms modified equal to or less than 2018-08-29T18:46:01Zequal to or more than 2018-08-29T18:46:01Z
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Astronomical radiation sources original
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X-ray point sources original
X-ray transient sources original
Cool cores original
Diffuse x-ray background original
X-ray bursts original
X-ray point sources original
dcterms modified equal to or less than 2018-08-29T18:45:15Zequal to or more than 2018-08-29T18:45:15Z
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X-ray sources original