StarTeller vs Cosmo Pro

Introducing StarTeller for iOS: your personal guide to the night sky, built for astrophotographers who refuse to miss a shot. StarTeller takes the guesswork out of planning your next imaging session. With a catalog of over 13,000 deep-sky objects at your fingertips, you'll know exactly when each target rises, peaks, and sets, down to the minute, so you can make every clear night count. Whether you're chasing faint nebulae, distant galaxies, or glittering star clusters, StarTeller tells you the best night to image each object from your exact location. See how long each target will be above the horizon, check its coordinates, and preview reference images, all before you ever step outside. Built as a planning companion for your telescope rig, StarTeller helps you build a session plan around what the sky is actually offering tonight. No more scrolling forums or cross-referencing almanacs. Just open the app, pick your targets, and know exactly when to shoot them. All visibility calculations run on your device with precise astronomical math, no internet required. Reference images load online, or download them in Settings for offline use. No AI-generated answers, just deterministic astronomy math that works anywhere, including dark sites with no signal. StarTeller Features: - 13,000+ deep-sky objects across the Messier, NGC, IC, SH2, and other catalogs - Full visibility data for every object: rise, peak, and set times, altitude arc, observing duration, nights visible per year from your location, magnitude, angular size, and coordinates in J2000 or JNow - Real reference photos for every target, so you know what you're aiming at before you set up - Search by object name, catalog ID (e.g. M42, NGC 6992), or constellation; filter and sort by type, catalog, altitude, size, and best date - Interactive sky map for any location and date, with constellation lines, star names, object paths, and an altitude grid - Altitude timeline: scrub through the night and watch any object's arc update in real time, on any night past or future - Telescope framing: save your scope and camera (focal length, reducer or Barlow, sensor size, or a direct field of view) and see exactly how a target frames up before you shoot - Custom horizon: trace your real skyline through the camera and StarTeller factors your trees and rooftops into every visibility calculation - Astronomical darkness: civil, nautical, and astronomical twilight, plus the exact dark window for tonight - Moon planning: phase, illumination, moonrise and moonset, angular size, and the next new and full moon dates - All seven planets tracked in real time, with rise, set, and peak times from your location - Set and save unlimited locations easily by using GPS, map pin, or manual coordinate entry, and keep your targets in a dedicated favorites view - AR sky mode: point your phone at the sky to align the map with the real night above you - Night vision red mode to preserve your dark adaptation in the field - Core planning works fully offline; optional image downloads for complete offline use Free includes the complete Messier catalog (110 objects) and access to all app features. Upgrade to StarTeller Pro to unlock all 13,000+ objects across NGC, IC, SH2, and additional catalogs. Whether you're a seasoned astrophotographer or just getting started with your first telescope, StarTeller puts the entire night sky on your schedule. The sky is waiting. Show up ready.

Journey across the entire observable universe — from the Moon to the relic light at the edge of all we can see. Space is an interactive 3-D atlas of the cosmos. Every object is placed in its true position in the sky and at its real distance, on a scale that lets the Moon and the cosmic horizon share one navigable space. Tap anything to discover how far back in time you are seeing it — because the further away an object is, the older the light reaching your eyes. EXPLORE IN 3-D Drag to orbit, pinch to zoom, and tap any object to inspect it up close. Glide past planets, stars, nebulae, galaxies, black holes and quasars rendered from real NASA and ESO imagery. LOOK BACK IN TIME Light takes time to travel. Each object reveals its light-travel time from Earth — see the Sun as it was 8 minutes ago, Andromeda 2.5 million years ago, and the cosmic dawn 13.8 billion years ago. A LIVING SOLAR SYSTEM Watch the planets orbit on real elliptical paths, with moons, asteroid and Kuiper belts, and comets streaming twin tails. 130+ CURATED WONDERS A hand-built catalogue spanning planets, famous stars, exoplanets, nebulae, galaxies, galaxy clusters, neutron stars, black holes, quasars and the cosmic web — each with facts, properties and distances verified against NASA, ESA and Gaia data. LIVE FROM NASA The nearest confirmed exoplanets stream in live from the NASA Exoplanet Archive, slotting into their true positions in the sky. JOURNEY THROUGH TIME Sit back for a guided tour outward from the Moon to the beginning of time, narrated by the light of each milestone along the way. LAUNCH FROM EARTH Choose a destination and ride a spacecraft there on a real gravity-turn launch — lift off, accelerate, cruise and arrive. FULLY BILINGUAL Complete English and Arabic support, with right-to-left layout. Switch languages anytime. Download Space and hold the universe in your hands.