Useful Tools and Information
- Why the Astronomical League?
- “Take your first steps …” 8 page introductory guide, (in English), (en Español)
- Handouts and Useful Information
- Night Sky Observing Tools (object guides and more)
- Eclipse Material for the 2023 and 2024 solar eclipses.
- What’s Up Doc, Tonight? Excel Spreadsheet (PC only) (download)
- A Free Astronomy Textbook v2024 (PDF File) – Astronomy for Mere Mortals: a complete introductory textbook, available free, updated annually. You may print it, or if you would like a printed copy, please contact the author, Aaron Clevenson, at aaron@clevenson.org
April 2025
- Navigating the mid-April Night Sky as a PDF File
- Navegando por el Cielo Nocturno de Abril as a PDF File
- Enchanting April as a PDF File
- Understanding the Light Year (ly) as a PDF File
- Entendiendo el año luz (al) as a PDF File
- What’s Up Doc – Eastern Time Zone (Washington DC) as a PDF File
- What’s Up Doc – Central Time Zone (Houston TX) as a PDF File
- What’s Up Doc – Mountain Time Zone (Boise ID) as a PDF File
- What’ s Up Doc – Pacific Time Zone (Seattle WA) as a PDF File
March 2025
- Navigating the mid-March Night Sky as a PDF File
- Navegando por el Cielo Nocturno de Marzo as a PDF File
- March Lunar Eclipse as a PDF File
- Alpha Ursa Major as a PDF File
- Evening Earthshine as a PDF File
- What’s Up Doc – Eastern Time Zone (Washington DC) as a PDF File
- What’s Up Doc – Central Time Zone (Houston TX) as a PDF File
- What’s Up Doc – Mountain Time Zone (Boise ID) as a PDF File
- What’ s Up Doc – Pacific Time Zone (Seattle WA) as a PDF File
February 2025
- Navigating the mid-February Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Febrero PDF File, or as a JPG File
- Venus Crescent as a PDF File, or as a JPG File
- Young Moon, Mercury, and Venus as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone (Washington DC) as a PDF File
- What’s Up Doc – Central Time Zone (Houston TX) as a PDF File
- New* – What’s Up Doc – Mountain Time Zone (Boise ID) as a PDF File
- What’ s Up Doc – Pacific Time Zone (Seattle WA) as a PDF File
January 2025
- Navigating the mid-January Night Sky as a PDF File, JPEG File
- Navegando por el Cielo Nocturno de Enero PDF File, JPEG File
- Moon Occults Mars as a PDF File, JPEG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
December 2024
- Navigating the mid-December Night Sky as a PDF File
- Navegando por el Cielo Nocturno de Diciembre as a PDF File
- Mars and M44 as a PDF File
- Retrograde Mars as a PDF File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
November 2024
- Navigating the mid-November Night Sky as a PDF File, JPEG File
- Navegando por el Cielo Nocturno de Noviembre PDF File, JPEG File
- Venus and M8 as a PDF File, JPEG File
- Gamma Arietis as a PDF File, JPEG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
October 2024
- Navigating the mid-October Night Sky as a PDF File
- Navegando por el Cielo Nocturno de Octubre PDF File
- Circlet B as a PDF File
- Beta Piscis Austrini as a PDF File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
September 2024
- Navigating the mid-September Night Sky as a PDF File, JPEG File
- Navegando por el Cielo Nocturno de Septiembre PDF File, JPEG File
- September- Partial Lunar Eclipse as a PDF File, JPEG File
- Eta Cassiopeiae as a PDF File, JPEG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
August 2024
- Navigating the mid-August Night Sky as a PDF File, JPEG File
- Navegando por el Cielo Nocturno de Agosto PDF File, JPEG File
- August – Mars and Jupiter as a PDF File, JPEG File
- Xi Cephei as a PDF File, JPEG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
July 2024
- Navigating the mid-July Night Sky as a PDF File
- Navegando por el Cielo Nocturno de Julio PDF File
- July – Moon and Spica as a PDF File
- Beta Scorpii as a PDF File
- False Comet as a PDF File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
June 2024
- Navigating the mid-June Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Junio PDF File, or as a JPG File
- June – Zuben & Omega SCO as a PDF File, or as a JPG File
- Beta Cygni as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
May 2024
- Navigating the mid-May Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Mayo PDF File, or as a JPG File
- May – Moon and M44 as a PDF File, or as a JPG File
- T Coronae Borealis as a PDF File, or as a JPG File
- Binoculars and Double Stars as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
April 2024
- Navigating the mid-April Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Abril PDF File, or as a JPG File
- April’s Enchanted Evening as a PDF File, or as a JPG File
- Iota Cancri as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
March 2024
- Navigating the mid-March Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Marzo PDF File, or as a JPG File
- Evening Mercury as a PDF File, or as a JPG File
- Alpha Ursa Major as a PDF File, or as a JPG File
- NGC 4435 & NGC 4438 as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
February 2024
- Navigating the mid-February Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Febrero PDF File, or as a JPG File
- Epsilon (8) Monocerotis as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
January 2024
- Navigating the mid-January Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Eneroas a PDF File, or as a JPG File
- Delta Orionis (Mintaka) as a PDF File, or as a JPG File
- January Morning Scene as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
December 2023
- Navigating the mid-December Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Diciembre as a PDF File, or as a JPG File
- Eta Tauri (Alcyone) as a PDF File, or as a JPG File
- Io, Europa, and Ganymede Eclipses as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
November 2023
- Navigating the mid-November Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Noviembre as a PDF File, or as a JPG File
- Eta Persei as a PDF File, or as a JPG File
- November PM Scene and M31 as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
October 2023
- Navigating the mid-October Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Octubre as a PDF File, or as a JPG File
- Gamma Andromedae as a PDF File, or as a JPG File
- The Moon, Venus and Regulus as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
September 2023
- Navigating the mid-September Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Septiembre as a PDF File, or as a JPG File
- Delta Cephei as a PDF File, or as a JPG File
- The Moon and Venus as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’ s Up Doc – Pacific Time Zone as a PDF File
August 2023
- Navigating the mid-August Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Agosto as a PDF File, or as a JPG File
- Beta Capricorni as a PDF File, or as a JPG File
- The Moon and Antares as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’s Up Doc – Pacific Time Zone as a PDF File
July 2023
- Navigating the mid-July Night Sky as a PDF File, or as a JPG File
- Navegando por el Cielo Nocturno de Julio as a PDF File, or as a JPG File
- Delta Serpentis as a PDF File, or as a JPG File
- Venus, Mars, Mercury, and the Moon as a PDF File, or as a JPG File
- What’s Up Doc – Eastern Time Zone as a PDF File
- What’s Up Doc – Central Time Zone as a PDF File
- What’s Up Doc – Pacific Time Zone as a PDF File
