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node
(Encyclopedia) node, in astronomy, point at which the orbit of a body crosses a reference plane. One reference plane that is often used is the plane of the earth's orbit around the sun (ecliptic).…synodic period
(Encyclopedia) synodic periodsynodic periodsĭnŏdˈĭk [key], in astronomy, length of time during which a body in the solar system makes one orbit of the sun relative to the earth, i.e., returns to the…halo, in meteorology
(Encyclopedia) halo, in meteorology, short-lived circles or arcs, and less commonly spikes and crosses, of colored or whitish light surrounding the moon or sun or in clouds as seen from above. A halo…conjunction, in astronomy
(Encyclopedia) conjunction, in astronomy, alignment of two celestial bodies as seen from the earth. Conjunction of the moon and the planets is often determined by reference to the sun. When a body is…albedo
(Encyclopedia) albedoalbedoălbēˈdō [key], reflectivity of the surface of a planet, moon, asteroid, or other celestial body that does not shine by its own light. Albedo is measured as the fraction of…Mountains of the Moon
(Encyclopedia) Mountains of the Moon, Africa: see Ruwenzori.Moon, Mountains of the
(Encyclopedia) Moon, Mountains of the, Africa: see Ruwenzori.Enceladus
(Encyclopedia) EnceladusEnceladusĕnsĕlˈədəs [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn II (or S2), Enceladus is 310 mi (500 km) in diameter,…month
(Encyclopedia) month, in chronology, the conventional period of a lunation, i.e., passage of the moon through all its phases. It is usually computed at approximately 29 or 30 days. For the…Charon, in astronomy
(Encyclopedia) Charon, in astronomy, the natural satellite, or moon, of Pluto.Trending
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