Every Planet vs APOD Explorer

Every Planet turns the whole observable universe into something you can hold in your hand. Tap once and the World Forge builds a planet that has never existed before: an ocean world wrapped in cloud, a ringed gas giant, a lava world cracked with light, a frozen wanderer far from its star. Every world is unique and generated from a single seed, so the one you just made is one you will never see again unless you keep it. The worlds are imagined. The physics behind them is not. Every planet carries an honest science dossier. Its year is computed with Kepler's third law. Its warmth comes from the real luminosity of its star and the greenhouse effect of its air. You see its distance from Earth, the year your light would arrive, the length of its day, its host star's temperature, and whether liquid water is even possible. Estimates carry honest uncertainty, the way real astronomy does. WHAT YOU CAN DO Forge a world Make a new world in a tap, or aim the Forge toward what you want to find: water, a giant, two suns, or simply something strange. Keep the ones worth keeping Save a world to your Archive, give it a name, and write a note about why you stopped there. Unsaved worlds are gone the moment you move on, so the good ones are worth catching. Read the real science Open any world's dossier for a plain, careful explanation of its orbit, star, mass, and light, tied back to the methods astronomers actually use. Learn the universe, and remember it The Observatory holds short daily recall questions built on spaced repetition, so real ideas actually stick. Track a gentle streak and watch how much of the sky feels familiar. Travel outward Every discovery carries you about eight percent deeper into space, past real landmarks, all the way to the edge of the observable universe. Go deeper in the Observatory An orbit lab to move a world through space, a field guide to the stars that make planets possible, an atlas of twelve genuinely strange real worlds, a guide to how we find planets we cannot see, and the big numbers that put it all in scale. QUIET BY DESIGN No account. No ads. No tracking. Everything you make stays on your device. Optional ambient audio for the long trip outward. Built to be calm, factual, and yours. There are around seven hundred quintillion rocky planets out there. Humanity has confirmed about six thousand. Every Planet is a small, honest way to feel that scale, one world at a time.

Every day, NASA publishes a new astronomy picture or video, with an explanation written by a professional astronomer. APOD Explorer brings it to you with an experience built for exploring the universe, not just looking at it. THE FULL ARCHIVE SINCE 1995 Over 11,000 photos and videos, from the very first APOD to today. Full-text search across titles and explanations, curated tag collections (galaxies, nebulae, eclipses, Earth from space, and many more), and an "On This Day" section showing what was published on this date across the years. READINGS TAILORED TO YOU, ON DEVICE With Apple Intelligence, every explanation can be generated at different reading levels: quick, general, for kids, or for experts. NASA's original explanation can also be translated right on your device — nothing is sent to any server. FAVORITES THAT SYNC Save the photos you love and access them from any of your devices through iCloud. No one else can see them. WIDGETS AND LOCK SCREEN Two widgets — "Picture of the Day" and "Today's Sky" — that refresh themselves every morning, on the Lock Screen too. SHARE WHAT YOU DISCOVER Share the photo or, when the day's APOD is a video, a poster generated from it, straight from the detail view or from the widgets extension. NO ACCOUNTS, NO ADS, NO TRACKING APOD Explorer doesn't require sign-up and doesn't show ads. If you enjoy the app, you can leave a voluntary tip from Settings — a gesture of support that never unlocks features. A daily window into the universe, with NASA's complete archive always in your pocket.