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Melvil Decimal System: 523.84

Wording: Mathematics and Science > Astronomy > Astronomical objects and astrophysics > Stars > Variable, double and multiple stars

Dewmoji: πŸ”¬ > 🌌 > 🌌 > ? > ?

0
Information
174,769
ℹ️
1
Philosophy and Psychology
162,176
πŸ’­
2
Religion
425,946
πŸ™πŸ½
3
Social Sciences
883,500
πŸ‘«
4
Language
118,384
πŸ’¬
5
Mathematics and Science
274,667
πŸ”¬
6
Technology
640,759
πŸ’‘
7
Arts and Recreation
653,832
🎨
8
Literature
867,919
πŸ“š
9
Biography and History
552,874
πŸ—Ώ
50
General Science
23,126
πŸ”¬
51
Mathematics
51,420
βž—
52
Astronomy
15,262
🌌
53
Physics
26,422
🍎
54
Chemistry
15,666
βš—
55
Earth sciences & geology
24,788
🌎
56
Fossils & prehistoric life
6,062
πŸ’€
57
Life Sciences
36,844
🐠
58
Botany
15,500
🌿
59
Zoology
59,577
🐼
520
Astronomy
3,692
πŸ”­
521
Celestial Mechanics
247
βš™
522
Telescopes and handbooks
980
πŸŒƒ
523
Astronomical objects and astrophysics
7,690
🌌
524
Maps and Observations [No longer in use]
32
525
Earth
392
🌍
526
Geodesy
1,147
🌐
527
Celestial Navigation
94
πŸ—Ί
528
Ephemerides; Nautic almanacs
138
πŸ“’
529
Chronology
850
⏳
523.0
555
523.1
Universe
1,660
523.2
Solar system
617
523.3
Moon
389
πŸŒ•
523.4
Planets
1,151
🌍
523.5
Meteors and zodiacal light
182
523.6
Comets
211
523.7
Sun
538
β˜€οΈ
523.8
Stars
1,219
523.9
Transits and occultations
76
523.80
117
523.81
Stellar parallax, distance
3
523.82
Heat and light; Photometric observations; Magnitude; Visibility
18
523.83
Proper motion, stardrift
3
523.84
Variable, double and multiple stars
96
523.85
Clusters and nebulas
27
523.86
Physcial constitution
2
523.87
Spectrum
9
523.88
128
523.89
Constellations, maps, catalogs, etc.
65
523.840523.841
27
523.842523.843523.844
63
523.845523.846523.847523.848523.849

Works under MDS 523.84

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Wording

1922 Edition
Modern language
Emoji

"Far Friends"

MDS classes with significant recommendations overlap, excluding ones under the same top-level class.

None

What is MDS?

Melvil stands for "Melvil Decimal System," named after Melvil Dewey, the famous librarian. Melvil Dewey invented his Dewey Decimal System in 1876, and early versions of his system are in the public domain.

More recent editions of his system are in copyright, and the name "Dewey," "Dewey Decimal," "Dewey Decimal Classification" and "DDC" are registered trademarked by OCLC, who publish periodic revisions.

LibraryThing's MDS system is based on the classification work of libraries around the world, whose assignments are not copyrightable. MDS "scheduldes" (the words that describe the numbers) are user-added, and based on public domain editions of the system.

The Melvil Decimal System is NOT the Dewey Decimal System of today. Wordings, which are entered by members, can only come from public domain sources. The base system is the Free Decimal System, a public domain classification created by John Mark Ockerbloom. Where useful or necessary, wording comes from the 1922 edition of the Dewey Decimal System. Language and concepts may be changed to fit modern tastes, or to better describe books cataloged. Wordings may not come from in-copyright sources.

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