Heliosphere - Solar System

Explore Space Around You

Free · In-App Purchases · Designed for iPad. Not verified for macOS.

Fly through a real-time 3D solar system: eight planets, moons and comets on true orbits, live Voyager-to-Parker spacecraft, plus astronomy lessons and quizzes. Explore the solar system at your fingertips. Heliosphere is a real-time 3D solar system simulation powered by NASA JPL Horizons data. It accurately recreates the orbits of planets, moons, comets, and dwarf planets while tracking the real positions of active spacecraft. * Real-time 3D Solar System Simulation — 8 planets, 5 dwarf planets, 10+ moons, and 4 comets — Precise Keplerian orbit calculations based on real astronomical data — Time travel from 1900 to 2100 — Pan, zoom, and rotate for a free-roaming perspective — Switch to planet-centric viewing mode * Live Spacecraft Tracking — Voyager 1, 2 | Pioneer 10, 11 — Cassini | Juno | New Horizons | Parker Solar Probe — Real position data from NASA JPL Horizons API * Deep Sky Exploration — Over 150 bright stars — 530 Milky Way stars — 124 deep-sky objects (Messier, NGC/IC catalogs) * Comprehensive Astronomy Education — 6 difficulty levels from middle school to graduate — Core concepts: Kepler's Laws, gravity, escape velocity, and more — Mission timelines for Voyager, Cassini, New Horizons, and others — 60+ quiz questions to test your knowledge — Historical space event date-guessing challenges * Free for Everyone — All content available at no cost — No ads — 11 languages supported Experience the beauty of the cosmos and the wonder of science through scientifically accurate data and intuitive interaction.

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What's New in 1.14.0 Positional Accuracy - The Moon is now where the real Moon is. It used to be drawn far from its true position even on eclipse days - The Moon's ecliptic latitude and orbital inclination are modelled. Every moon used to sit exactly in the ecliptic, which would mean an eclipse every single month - Planets travel real elliptical orbits instead of circles, speeding up near perihelion and slowing near aphelion as they should - Earth's rotation is anchored to real sidereal time, so the day/night terminator falls where it really does — and with a fixed axis, the seasons appear - All ten moons (the Moon, Phobos, Io, Titan and the rest) use measured orbital data - Verified against JPL Horizons positions across the full 1900-2100 range Eclipse Shadows - During a solar eclipse the Moon's shadow now falls on Earth in its true place - Umbra and penumbra are computed at real size. The umbra is about 2% of Earth's diameter, so it reads as a small dot — which is exactly how it looks from space - Annular eclipses draw a lighter shadow, because the Sun is never fully covered Three Scale Axes - Body size, orbit spacing and moon distance are three independent controls - Set all three to the right and the famous check holds: the other seven planets, laid end to end, just fit inside the Moon's orbit - At realistic size the Sun reaches its true 109 Earth radii - Your choices are remembered Navigation - Selecting a body follows it as time advances - You can tap orbiting planets directly in the 3D view - Two-finger drag slides the view - Step the date by exact units: 10 years, 1 year, 1 month, 1 week, 1 day - Step playback speed the same way: 1 hour, 1 day, 1 week, 1 month, 1 year per second - The speed range now reaches a year per second, so the slow outer planets — Neptune above all — finally get somewhere - The bottom bar can be hidden on iPhone Astronomical Events - Jump straight to an event's date from the calendar - Meteor showers jump to their peak, not the start of the viewing window Learning - New topic, "Scale and Distance", on why true scale cannot be drawn on a screen and what this app exaggerates as a result Other Improvements - Fixed moons such as Io appearing inside their parent planet at realistic size - Fixed the Moon's orbit overlapping Venus's - Fixed Triton not moving at all - Fixed the outer planets being clipped away when orbits were widened - Selecting a body now shows a shortcut into the Learning Center Your favorites, achievements and streak are all preserved.

The developer, CHUNGKIL KIM, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

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Privacy practices may vary based, for example, on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Provider
  • CHUNGKIL KIM
Size
  • 38 MB
Category
  • Education
Compatibility
Requires iOS 18.0 or later.
  • iPhone
    Requires iOS 18.0 or later.
  • iPad
    Requires iPadOS 18.0 or later.
  • Mac
    Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 26.0 or later.
Languages
English and 11 more
  • English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Slovak, Spanish, Traditional Chinese
Age Rating
4+
In-App Purchases
Yes
  • 5 Coffees ₦ 24,900.00
  • 1 Coffee ₦ 4,900.00
  • 3 Coffees ₦ 14,900.00
Copyright
  • © CHUNGKIL KIM