Encyclopedia: Solar System

Explore 386 illustrated articles about planets, moons, dwarf planets, asteroids, comets, astronomy, missions, discoveries, and the science of our solar system. Search article titles and full text, open clear article pages, and follow linked topics without losing your place. Reading progress and themed badges help you build a path through the collection. Explore the solar system from several angles: - Timeline view follows discoveries, missions, scientists, and changing ideas. - Graph view reveals relationships between worlds, spacecraft, people, and concepts. - Map view adds geographic context for observatories, discoveries, and missions where source material provides it. - References and image credits keep source attribution visible. Thirty articles are free to read. A one-time purchase unlocks the complete encyclopedia for offline reading, including maps, timelines, and graphs. Monthly or annual Premium includes the complete encyclopedia plus AI chat, with a seven-day free trial for eligible new subscribers. People who bought the original Full Version can restore permanent offline encyclopedia access; AI chat remains a separate Premium feature. AI chat answers grounded questions about the solar system and links back to relevant articles so you can continue reading and check the context. Article text is adapted from Wikipedia contributors under Creative Commons Attribution-ShareAlike 4.0. Every article includes source, revision-history, and image-credit links. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/