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Basics of Positional Astronomy
Computing Planetary Positions
Constants & Equations
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Elliptical Orbit Calculator
iFigure Astronomy Calculators
Light Year: What Does It Mean?
Powers of Ten
Powers of Ten
Trigonometry & Astronomy
What is an Angstrom?
Yahoo! Formulas & Constants
Celestial Sphere
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Annual Variations
Astronomical Coordinate Systems & Time Systems
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Coordinate Systems
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Finding Horizons on the Equatorial Sky Chart
Hour Angle
International Celestial Reference System
Introduction to Spherical Astronomy
Monthly Variations
Motions in the Heavens
Organizing the Sky
Planetary Motions
Polar Sky Chart
Positional Astronomy Leaflet
Precession
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Right Ascension
Right Ascension & Declination
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Skinny Triangle
Small Angle Formula
Understanding Celestial Coordinates
Using Setting Circles
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How You Can Get the Approximate Sidereal Time
How to Set Up a Horizontal Sundial
International Dateline
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Light Years
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Make Your Own Sundial
New Millennium Leaflet
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Tell Time with Your Feet
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U.S. Naval Observatory Time Service Department
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33 Doubles Observing Project
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Astrophotography for Beginners
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Backyard Astronomy: Tips on Observing the Universe
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Future of Amateur Astronomy
Geocentric Parallax
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How to Start Right in Astronomy
Latitude is Everything
Measuring Distance Via the Parallax Effect
Messier Marathon
Messier45: Deep Sky Observer's Home
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Night Sky I
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Twelve Month Tour of the Messier Catalog
Using a Map at the Telescope
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Variable Stars
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Welcome to Astronomy
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What's Up this Month?
What's Up in the Sky?
Winter Star Watching Project: the Pleiades
Telescopes
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Introduction to Chromatic Aberration in Refractors
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Celestial Atlas 1826
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Down Under Sky Maps in Adobe Acrobat
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Hawaiian Astronomical Society Additional Objects
Hawaiian Astronomical Society Bennett Catalog
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NGC/IC Project
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Twelve Month Tour of the Messier Catalog
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Your Sky Object Catalog: Named Stars
Constellations, Mythology & Naming Conventions
48 Classical Constellations
Alphabetical Listing of Constellations
Artistic Representation of Some of the Constellations
Astronomical Names & How They Are Assigned
Basic Facts About the Classical Constellations
Classical Mythology
Constellations
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Constellation Index
Constellation List and information at St. Cloud University
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Constellation Quiz
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Constellations & Their Stars
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Hawaiian Astronomical Society Constellation List
Lyra and Vega
Myths & Tales Associated with the Constellations
Name that Constellation
Names of the Constellations
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Nomenclature: Double Stars & Variables
Planets & Their Children
Real Constellations of the Zodiac
StarGazer
Star Myths & Constellations Lore
Star Names
Star Names Table
Stellar Names
Table of Constellations
Tour the Constellations
Tour of Orion, the Hunter
What are Constellations?