Advertisers in This Issue Astronomy equipment manufacturers and dealers are a valuable resource for amateur and professional astronomers alike. Patronize our advertisers in this issue and enjoy all the benefits of their expertise. Product Locator AAVSO »page 83 variable-stars organization with International Database aavso.org Astro-Physics »page 81 mounts / telescopes astro-physics.com Celestron »page 3 accessories / binoculars / mounts / telescopes celestron.com iOptron »page 5 mounts / telescopes ioptron.com QHYCCD Light Speed Vision »back cover cameras qhyccd.com Sky-Watcher »inside front cover binoculars / mounts / telescopes skywatcherusa.com Stellarvue »inside back cover eyepieces / telescopes stellarvue.com Ad Index AAVSO ..................................................... 83 American Astronomical Society ................ 83 Arizona Sky Village Portal ......................... 80 Astro-Physics .......................................... 81 Casitas de Gila Guesthouses .................... 80 Celestron ................................................... 3 Consumer Cellular ................................... 79 DIRECTV .............................................. 5, 81 Generac ................................................... 71 iOptron ...................................................... 5 Knightware .............................................. 80 Lunatico Astronomia ................................ 80 MobileHelp .............................................. 79 NexDome ................................................. 81 Nine Planets Ring .................................... 81 Precise Parts ........................................... 80 QHYCCD Light Speed Vision ..................... C4 Revolution Imager .................................... 81 Sky & Telescope .................................. 1, 73 Sky-Watcher ............................................ C2 Stellarvue ................................................ C3 Technical Innovations ......................... 80, 81 The Liquid Sun ......................................... 80 The NASA Letters ..................................... 80 TruGreen .................................................. 71 William Optics .......................................... 81 Willmann-Bell Books ................................ 73 To advertise in our Product Locator, please email Rod Nenner at: ads@skyandtelescope.org 82 NOVEMBER 2023 * SKY & TELESCOPEhttp://www.qhyccd.com http://www.aavso.org http://www.astro-physics.com http://www.skywatcherusa.com http://www.celestron.com http://www.stellarvue.com http://www.ioptron.com