ぐるぐる ZEISS IX型 vs Eclipse Simulator

「ぐるぐる ZEISS IX型」は、ドイツのカール・ツァイス社が製作した大型ドーム用光学式プラネタリウム「ユニバーサリウムIX(9)型」を手のひらで体験できるアプリです。 ---------------------- 光学式プラネタリウム UNIVERSARIUM Model IX ドイツのカール・ツァイス社が製作した大型ドーム用光学式プラネタリウム「ユニバーサリウムIX(9)型」です。名古屋市科学館で2011年3月から活躍しています。 スターボールと呼ばれる球体からは肉眼で見ることのできる9,100個の恒星や星雲・星団、星座絵などを投影します。LED光源(2018年に更新)の光は光ファイバーを通して恒星原板の穴に導かれており、光源の光を効率良く使えます。そのため、本来の星に近いシャープかつ明るい星像を再現することが可能になりました。すべての恒星を自然に近いパターンで瞬かせることもできます。 8台の惑星投影機は日々位置を変える惑星や太陽、月を投影します。惑星の動きや月の満ち欠けはもちろん、日食・月食を再現することもできます。

Eclipse Simulator is an educational and investigative tool for finding unusual solar and lunar eclipses by combining an observing location, horizon conditions, and long-term Earth-rotation variation (ΔT). Its search catalog spans astronomical year -999 (1000 BCE) through 5000 CE. Study each event through maps, a ground-level view, and contact times. Key features • Search solar and lunar eclipses by date range, eclipse type, location, and other available criteria. • Narrow the search with an observing location, solar horizon conditions near sunrise or sunset, lunar moonrise or moonset, and ΔT. • View solar-eclipse center and limit lines, partial-eclipse regions, and lunar-eclipse visibility on Apple Maps. • Choose an observing location and play the changing alignment of the Sun, Moon, and shadow from the ground. • Inspect the contact times that exist for the event, including C1–C4 for solar eclipses and P1–P4/U1–U4 for lunar eclipses. • Compare the standard ΔT model with alternative scenarios to understand how uncertainty affects historical and future timing and paths. • View stars and constellation lines adjusted to the selected event time instead of showing today’s sky. • Share the selected event as CSV or JSON and the displayed screen as PNG or PDF. On iPhone, the app uses focused screen-by-screen navigation. On iPad, its wider layout keeps the catalog and event workspace within easier reach. If you grant location access, it is used only to set the observing point to your current location. You can also select a point on the map or enter coordinates. About time and accuracy Results are modeled values derived from the ephemeris, ΔT model, and Earth-orientation model recorded with the bundled data. The broad search catalog includes a low-precision analytical ephemeris, while the calculation provenance for a selected event is shown in the app and exports. Uncertainty remains in ΔT, future civil-time rules, polar motion, lunar-limb terrain, local terrain, and weather. Historical and future views use present-day Apple Maps and do not reconstruct borders or cities from the selected era. Lunar-eclipse color is schematic. Use the app for education, understanding astronomical geometry, and comparing model assumptions. Do not rely on it as a guaranteed value for observation planning, navigation, scientific conclusions, or safety-critical decisions.