US Naval Observatory info on Phenomena of the Sun and Moon, Time, Calendars and Historical Events, Computing Astronomical Data and Phenomena, Celestial Navigation, and more

Annotated, nonprofit, educational hub site linking the best celnav sources on the net. Includes theory, practice, history, classroom resources, instruments, wayfinding, more.

Celestial Navigation Fundamentals.

Star Finder shows the celestial bodies used in celestial navigation ( 56 stars, 4 planets, Sun and Moon).

StarDate is the public education and outreach arm of the University of Texas McDonald Observatory. Our radio program airs daily on more than 300 stations. And our popular bimonthly astronomy magazine is the perfect skywatching companion for amateur astronomers or anyone interested in celestial events and space exploration. We also offer astronomy resources to teachers, the media, and the public.

We offer training and related products in all phases of marine navigation and weather. Besides actual instruction in navigation and weather, we produce and publish books (Starpath Publications) and software on navigation and related topics. The same materials we use in our classroom courses are now available for home study and online training. Seattle, Washington

Welcome to Your Sky, the interactive planetarium of the Web. You can produce maps in the forms described below for any time and date, viewpoint, and observing location. If you enter the orbital elements of an asteroid or comet, Your Sky will compute its current position and plot it on the map. Each map is accompanied by an ephemeris for the Sun, Moon, planets, and any tracked asteroid or comet. A control panel permits customisation of which objects are plotted, limiting magnitudes, colour scheme, image size, and other parameters; each control is linked to its description in the help file.