Moon

Cosma Home > Communication > Knowledge > Realm > Physical > Universe > Star > Solar System > Planet > Moon

Spotlight




Related

Subjects
Physical Universe (Mass, Force)
Galaxy, Star, Solar System, Planet, Moon, Asteroid, Comet
Mercury, Venus, Earth (Moon), Mars (3D), Jupiter, Saturn, Uranus, Neptune, Pluto

Resources

These are organized by a classification scheme developed exclusively for Cosma. More…

General

Portal

Our Solar System’s Moons (NASA), Moons (Wikipedia)

Dictionary

moon : a natural satellite of a planet — Webster

Oxford, OneLook, Free Dictionary, Wiktionary, InfoPlease, Word Reference, Urban Dictionary

Encyclopedia

Natural satellite or moon is a celestial body that orbits a planet or smaller body, which is called its primary. The two terms are used synonymously for non-artificial satellites of planets, of dwarf planets, and of minor planets. Of the inner planets, Mercury and Venus have no moons; Earth has one large moon, known as the Moon; and Mars has two tiny moons, Phobos and Deimos. The large gas giants have extensive systems of moons, including half a dozen comparable in size to Earth’s moon: the four Galilean moons, Saturn’s Titan, and Neptune’s Triton. Saturn has an additional six mid-sized moons massive enough to have achieved hydrostatic equilibrium, and Uranus has five. The Earth-Moon system is unique in that the ratio of the mass of the Moon to the Earth is much greater than any other planet-moon ratio in the Solar System, and the Moon’s orbit with respect to the Sun is always concave. — Wikipedia

Britannica, Columbia (Infoplease)

Search

WolframAlpha, DuckDuckGo

Preservation

Library

WorldCat, Library of Congress, UPenn Online Books, Open Library

Participation

Forum

Reddit

Blog

WordPress

News

NPR Archives

Book

ISBNdb

Government

Our Solar System, Moons (NASA)

Document

USA.gov

returntotop