DeepSkyCentral vs Eclipse Simulator

DeepSkyCentral is your AI-powered astronomy companion for all astronomers both visual observers and astrophotographers — plan your sessions, find your targets, and manage your gear all in one place. Built by astronomers- for astronomers. ASTRO AI, YOUR PERSONAL ASSISTANT Ask anything about astronomy, imaging, or equipment and get expert answers instantly. Astro AI recommends targets based on your location, gear, and the night's conditions, plus weather predictions built specifically for astronomical observing. FIND YOUR TARGETS AND YOUR SKY Use Target Finder and SkyView together with the FOV Image and Visual Framers to see exactly how a target will look through your telescope or camera before you head outside. Dark Sky Finder helps you locate the darkest nearby skies, and the Astro Calendar tracks moon phases and astronomical events. WEATHER & 10 DAY FORECAST MODELS Every astronomer has a keen eye for the weather - DeepSkyCentral Astro AI provides a summary of the current and upcoming conditions. Leverage the 10 day forecast with extensive data including cloud cover, seeing, transparency and dew predictions. And live radar (Pro subscription) FOV Calculator and Framer Find and frame your favorite targets with ease. See what your eyepiece or camera sees through your rig and frame your targets with ease. Create mosaics, and save directly to your personal Frame Library ( pro subscription). PLAN AND ORGANIZE EVERY SESSION Build Target Lists and Checklists, set up custom Equipment Profiles for your rigs, and use the Polar Alignment tool to get your mount dialed in fast. DeepSkyCentral's smart Session Planner and Session Diary (Pro Subscription) allows you to setup and record all your astro activity. Never miss a night, plan your sessions and get the most out of your astronomy journey. TARGET DATA Data includes best time of year to view or image a target, where the target is best viewable in the night sky, which filters to utilise, and detailed target summary. OVER 660,000 OBJECTS AND STARS Download specialized catalogue packs including the complete NGC/IC catalogue, the Washington Double Star Catalog, Sharpless HII regions for narrowband imaging, and a Gaia DR3 star field to magnitude 10 for precision framing and guiding — all available offline at your dark sky site. GO FURTHER WITH PRO Astro AI Pro, live satellite weather and cloud radar, live Aurora and Solar activity stats, the Astro Session Planner & Diary, an Image Library with plate solving, FITS file renaming and folder organization tools, unlimited locations and equipment profiles, and access to the Community Gallery and Dark Sky Location community sharing. EDUCATION AND KNOWLEDGE Extensive knowledgebase and terminology sections dive deep in the world of astronomy to help the beginner astronomer navigate through the night sky. Whether you're just starting to explore the night sky or refining an advanced astrophotography workflow, DeepSkyCentral brings everything you need into one place. Essentials and Pro are auto-renewing subscriptions, managed anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internal/terms/itunes/dev/stdeula/

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.