■Special Supplement: 2026 Astro Calendar The popular astronomical photography calendar is included as a special supplement. It lists astronomical phenomena that can be seen each month. It is a mini calendar that is also useful for stargazing.
■Special Feature: Astronomical Phenomena to Watch in 2026 A digest of astronomical phenomena to watch in 2026. We've selected some particularly noteworthy phenomena and will introduce them with visuals. In the early hours of January 7th, a Regulus occultation will occur, in which the moon will obscure the first-magnitude star Regulus in the constellation Leo. Regulus occultations will also occur on March 2nd and May 23rd (daytime). And, following on from 2025, a total lunar eclipse will be visible across Japan on the evening of March 3rd. On August 13th, a total solar eclipse will occur in Iceland and Spain, attracting many visitors from around the world. We'll also introduce other noteworthy astronomical phenomena, such as the Perseid meteor shower on August 13th and the Geminid meteor shower on December 14th.
■35 years of digital astronomical imaging
Cooled cameras for astronomical photography have now moved from the CCD era to an era where CMOS is the mainstream. SLR cameras have also shifted from mirrorless to mirrorless. There are many other changes in specifications and imaging that can be understood anew by looking at them over time. In this two-part series, we will explain the evolution of digital astronomical imaging over the past 35 years, including the early days from around 1990. In the first part, we will explain the changes in camera specifications from the dawn of digital cameras to 2025.
■PHOTO GALLERY Comet Lemmon (C/2025 A6), Comet SWAN (C/2025 R2)
Since mid-October, Comets Lemmon and Swan have been brightening, and many astronomy enthusiasts have been photographing the two comets. Many have also taken photos in urban areas using smart telescopes. This month, we will introduce images of Comets Lemmon and Swan taken in various locations around Japan and with a variety of equipment.
Released 25/12/05
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Astronomy Guide January 2026 Issue (Extra Large Edition) with Supplement | Seibundo Shinkosha Co., Ltd. (seibundo-shinkosha.net)