Description
■The disappearance of Saturn's rings■Observation of the disappearance of Saturn's ringsSaturn is famous as a planet with rings, but in 2025, there will be two "disappearances of Saturn's rings," when the rings will no longer be visible from Earth. The first disappearance of the rings will occur on March 24th, followed by the second on May 7th. However, the first disappearance of the rings is not suitable for observation because Saturn is located close to the Sun. On the other hand, around May 7th, the rings can be observed low in the eastern sky before dawn. Then, around November 25th, the rings will become extremely thin, making them difficult to see. We will explain the principles and observations of the disappearance of Saturn's rings, which occurs every 15 years.
■Report on the Chinese-made solar telescope "Heliostar 76Hα"
We will be taking a look at the solar observation telescope "Heliostar 76Hα" sold by Sky-Watcher. We will report on its performance, which is said to have double stack performance with a single etalon filter, by observing and photographing the actual sun.
■ Following Comet Atlas (C/2024 G3)
We still remember Comet Zijinshan/Atlas (C/2023 A3), which surprised us by becoming a naked-eye comet in October 2024, but in late January 2025, another comet, Comet Atlas (C/2024 G3), became a naked-eye comet in the Southern Hemisphere. Taking advantage of this opportunity, several volunteers from Japan made a quick trip to Australia and succeeded in photographing its majestic appearance. This article will introduce the expedition along with images of the comet that were photographed.
table of contents
[Feature]
The disappearance of Saturn's rings / Soma Observation of the disappearance of the Saturn rings / Kuniaki Horikawa Test report of the Chinese-made solar telescope (2) Hα solar telescope "Heliostar" / Kazuo Shiota
【TOPICS】
Mars Observation Report / Makoto Adachi
PHOTO GALLERY Following Comet Atlas, which captured Mars just before and after its closest approach, to Australia / Yusuke Habu Comet Atlas captured in New Zealand / Shushin Yamashita A challenge to large telescopes / Kunihiko Okano
AKUTSU CEBU OBSERVATORY Starry Sky Report / Tomio Akutsu Aurora Calendar March 2025 - June 2025 / Manabu Shinohara Wave Gear Mount PROXISKY UMi 17R / Shigemi Numazawa
[THE SKY]
Starry skies and astronomical observations in April / Shigemi Numazawa, Nanayo Wakiya
【NEWS＆EVENTS】
ASTRO NEWS / Seiichiro Naito, Ken Tsukada, Tomomi Miura
TG Information Bureau (new product information, etc.)
ASTRO SPOTS
Nationwide astronomy event information
[Readers' astronomical photos]
Comments from readers on the winners of the astronomical photographs (Grand Prize winner's notes)
[Series]
Spectacular Scenery with the Moon / Tsukasa Enomoto Guide to Nebulae and Star Clusters / Mitsunori Tsumura Astronomy Concise / Toshihiro Handa
TGFactory/Saijo Yoshihiro Readers Space!
Masa is on the go!
100 Years of the Planetarium: Visiting the Stars on Earth / Tsukada Kenryuka Koen's Entropy Gaia!
Rymansat a go-go! / Yoshi is a Rocketeer! / Masataka Adachi Space Weather / Manabu Shinohara A Place with Stars / Masayuki Mori
[Observation Guide]
Astronomical Data / Mitsuru Souma Meteor Guide / Kazuhiro Nagata Star Occultation Guide / Toshio Hirose Variable Star Guide / Masato Oshima Variable Star Status / Kenji Hirosawa Sunspot Status / Noritaka Tokimasa Asteroid Guide / Kazuo Watanabe Artificial Celestial Body Guide / Yasuyasu Hashimoto Planet Status / Kuniaki Horikawa, Makoto Adachi Comet Guide / Shuichi Nakano Colophon of Application Form
Released 03/05
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Astronomy Guide April 2025 issue | Seibundo Shinkosha Co., Ltd. (seibundo-shinkosha.net)