Category:Earth

Library of Congress Classification Dewey Decimal Classification Wikipedia has a category Earth, which it categorizes in Nature
 * subject heading QB630-QB638.8 (Earth as a planet), of subclass QB500.5-QB785 -- Solar system, of subclass QB495-QB903 -- Descriptive astronomy, of subclass QB -- Astronomy
 * “Thousand Sections” subclass 525 Earth (Astronomical geography), of “Hundred Divisions” subclass Astronomy