Epicycle: Learn the Sky

Look up. Ask questions. Discover together. Epicycle is a free astronomy companion from FlowDevs for curious explorers and families. Learn about the sky at home, in a classroom, or outdoors—without accounts, ads, subscriptions, or in-app purchases. LEARN ANYWHERE Explore educational cards for the Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn. Discover all 88 constellations, their guide figures, stories, and modern astronomy facts. Search the bundled star catalog and learn what brightness, coordinates, and spectral types mean. TRY A SPACE QUIZ Answer five questions at your own pace. Every answer comes with an explanation, and you can play again whenever you like. EXPLORE A SKY MAP Choose one of six example cities and change the viewing time. Watch how the modeled sky changes, show or hide constellation lines, and tap solar-system objects to learn more. No camera or location…