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Firefly Planisphere: Latitude 42 Degrees North

* Book Type:

Publisher: Firefly Books

Edition Notes: Fifth Edition
Author Statement: Star maps by Wil Tirion ; Text by Robin Scagell
Audience: Trade
Specs: laminated plastic planisphere and instruction guide in a protective plastic envelope
Trim Size: 11 3/4" X 11 3/4"
Language code 1: eng
Publication Date: 20131205
Price: Select Below


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Firefly Planisphere: Latitude 42 Degrees North

A valuable tool for both beginners and advanced stargazers, updated for use to 2020.

A valuable tool for both beginners and advanced stargazers, updated for use to 2022.

Astronomy Forum called the Firefly Planisphere "a work of art [that] no amateur astronomer should be without." Charted by the month, day, hour and minute, it is quick, battery-free and weather-resistant. The stargazer needs only to turn the planisphere to align the current date and time. What the see-through panel reveals will match the view of the night sky.

This edition of the Firefly Planisphere is updated for use to 2022. It shows the position of the stars for every night of the year. Icons that describe star magnitudes -- the larger the symbol, the brighter the star -- make it easy to locate specific stars. Stargazers will be able to locate planets, stars, constellations, globular clusters, nebulas, galaxies and other celestial wonders.

Other features include:

  • At-a-glance coordinates for locating the brightest objects in the sky
  • Planetary tables to locate Venus, Mars, Jupiter and Saturn
  • Times of sunrise and sunset for each day
  • Declination and right ascension scales
  • The ecliptic path.

The booklet provides accurate information on bright and faint stars, the Milky Way and deep-sky searching. Other topics include:

  • Using the planisphere
  • Finding planets, sunrise and sunset
  • How to read a star map
  • Learning the sky
  • Exploring the skies, season by season.

With its sturdy construction, smooth wheel rotation, easy-to-read booklet and protective pocket, the Firefly Planisphere is simply the handiest guide to the night sky for the amateur astronomer.


Robin Scagell is the author of Stargazing with a Telescope and five other astronomy titles. He runs Galaxy Picture Library, which is devoted to photographs of astronomy and space.

Wil Tirion is a uranographer (celestial cartographer). The minor planet 4648 Tirion is named after him. He has done the star charts for numerous books, including Night Sky Atlas: The Moons, Planets, Stars and Deep Sky Objects.

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