Astronomy

Sky

Celestial Sphere

  • Basic Coordinates & Seasons
  • Celestial Navigation Net
  • Celestial Sphere
  • Coordinate Systems in Astronomy
  • Introduction to Spherical Astronomy
  • Measuring Distance Via the Parallax Effect
  • Parallax Effect
  • Precession of the Equinoxes
  • Retrograde Motion of Planets
  • Rotating Sky
  • Seasons & the Zodiac
  • Small Angle Formula
  • Trigonometric Parallax
  • Top of Page

    • Observing

  • Almanac, Sky & Telescope
  • Astronomical Observing with Unaided Eye
  • Hawaiian Terms for Stars, Planets and Space
  • In the Sky
  • Night Sky in the World
  • Occultations and Possible Rings of Pluto, Sky & Telescope
  • PlanetDiary
  • Planet Positions
  • Saving Dark Skies, Sky & Telescope
  • Sky at a Glance, Sky & Telescope
  • Star Finding with a Planisphere, Sky & Telescope
  • Star Gazing Basics, Sky & Telescope
  • The Sky Online Planetarium
  • View Sky from Cities Around the World
  • Top of Page

    • Tours

  • Daily Almanac
  • Night Sky Sights
  • Nightwatch
  • Object Seasonal Observability
  • Qué tal in the Current Skies
  • Sky Eye
  • This Week's Sky
  • Tonight's Sky
  • What's Up
  • Top of Page

    • Telescopes

  • Above the Clouds: Telescopes on Mauna Kea, WGBH, 2009
  • Astronomical Observing with Telescopes
  • Astronomy Equipment, Sky & Telescope
  • Eyes on the Skies (1a): New Views Of The Skies
  • Eyes on the Skies (1b): New Views Of The Skies
  • Eyes on the Skies (2): Bigger is Better
  • Eyes on the Skies (3): Technology to the Rescue
  • Eyes on the Skies (4): From Silver to Silicon
  • Eyes on the Skies (5): Seeing the Invisible
  • Eyes On The Skies (6): Beyond Earth
  • Telescope Basics
  • Telescopes & Binoculars, Sky & Telescope
  • World's Largest Optical Telescopes
  • Top of Page

    • Hubble

  • Hubble Deep Field, Hubblesite
  • Hubble Presentation
  • Hubble Ultra Deep Field 3-D
  • Top of Page

    • Charts

  • Atlas of the Universe
  • Deep Sky Database
  • Down Under Sky Maps in Adobe Acrobat
  • Interactive Sky Charts
  • NGC Objects
  • Sky Chart, Sky & Telescope
  • Skymaps.com
  • Sloan Digital Sky Survey
  • Stars by Bright Star Catalog Order
  • Star Database
  • Stellar Database
  • Your Sky Object Catalogs
  • Top of Page

    • Constellations

  • Alphabetical Listing of Constellations
  • Classical Mythology
  • Constellations
  • Constellations to Know
  • Constellations by Month
  • Constellations & Their Stars
  • Constellation Visibility
  • List of Constellations
  • Meeks' Constellations
  • Modern Constellations
  • StarDate Online Constellations
  • Tour of Orion, the Hunter
  • What are Constellations?
  • Your Sky Object Catalog: Constellations
  • Top of Page

    • Messier Objects

  • Listing of Messier Objects
  • Meeks' Messier Objects
  • Messier Catalog
  • Top of Page