Node_(astronomy) Node_(astronomy)

Node (astronomy) - Definition and Overview

Related Words: Astrophotography, Astrophysics, Spectrography, Spectroscopy

A node is one of two points where a body's orbit crosses the ecliptic, called the ascending node (when the body is moving northward) and descending node (when the body is moving southward). The lunar nodes are subject to lunar precession, this is the gradually shift westward because of the gravitational pull of the Sun upon the Moon. (See also: eclipse)

Example Usage of (astronomy)

simoncpage: RT @graphicidentity: International Year of Astronomy Prints Available http://bit.ly/5v9fF0 (via @simoncpage)
GetAstroJobs: Physics Researcher - PhD - Astronomy - Neutrino - P... - Baton Rouge, LA (http://tinyurl.com/ygr96r6) Get Astronomy Jobs #Astronomy #70801
Koreman: Astronomy: Our First Interstellar Destination: A Brown Dwarf? http://bit.ly/74e7zr cryoplanets, predictions, future, space travel, WISE
Copyright 2009 WordIQ.com - Privacy Policy  :: Terms of Use  :: Contact Us  :: About Us
This article is licensed under the GNU Free Documentation License. It uses material from the this Wikipedia article.