AstroShort vs Cosmic Specks

Astro Explorer was built together — with curiosity, a sense of social connection, learning and education at its heart. It began as a gift from a dad to his kid, and grew into a hand-built universe for curious minds of every age. THE WHOLE UNIVERSE, BY TOUCH Fly between the Sun, all eight planets and the Moon. Zoom from a planet up close all the way out to the Milky Way — and the real black hole at its heart, Sagittarius A*, shown as the 2022 Event Horizon Telescope image. Nothing here needs reading to explore — a child who can't read yet can pilot the entire universe with a fingertip. DEEP FACTS ON EVERY PLANET Tap any planet — all eight, plus Pluto — to open its observation plate: its moons, its weather, the missions we've sent, and how it truly sizes up. The facts go deep, in plain language, and every one is sourced straight from NASA fact sheets and JPL. GO INSIDE REAL WORLDS Earth, Mars and the Moon aren't just spheres. Drill down to real places — the Grand Canyon, Olympus Mons, the Sea of Tranquility — meet animals, visit landmarks, and watch each place come alive with its own animated scene. Every fact carries its source, straight from NASA planetary fact sheets and the International Astronomical Union. TWO WAYS TO EXPLORE - Explorer mode (the default): a clean, premium look where grown-up facts, side-by-side planet comparisons and a daily discovery feed are one tap away. - Kid mode: a playful skin made for little hands — bigger buttons, a gentler pace, and deeper content tucked safely behind a parent hold-gesture. BUILT BY ITS EXPLORERS Here's the part we love most. Have an idea for the app? A child can simply say it out loud. Their words are turned into text right on your device, a grown-up reads it and decides whether to send it — anonymously, never any audio, never any account. On the Builders Board inside the app you can watch ideas from explorers around the world come together: what's being considered, what's being built, and what just shipped. Great ideas can become real features in days. This app is built by its explorers. HONEST BY DESIGN - Works fully offline — every planet, place and fact, with zero connection. - No accounts. No ads. No analytics. No tracking. Ever. - The only thing that ever touches the internet is the daily discovery feed: a single anonymous download of the same public file everyone gets, with no identifiers and no cookies. Offline, it shows the last feed with a visible date. - Facts are sourced and scale is honest: planets are stylized so small worlds stay visible, but the truths always hold — Jupiter is always the biggest, Mercury always closest to the Sun. Made for families. A friendly narrator reads names and facts aloud, so a pre-reader can explore and learn by ear. Safe for the youngest explorer to use alone, deep enough for the most curious adult.

Space is almost all empty. That turns out to be the beautiful part. Every picture of the solar system you've ever seen tells you small white lies. The planets are swollen so you can see them. The orbits are squashed flat and drawn as tidy circles. Everything is crowded together so it fits on the page. Cosmic Specks is the same solar system with the lies switched off, one at a time, so you can build an intuition for what was actually removed. IT OPENS WITH THE ARGUMENT. A ninety-second tour names the five lies and switches each one off, live: the sizes, the flatness, the circles, the stillness, the diagram eclipses. IT ISN'T FLAT. Turn on inclinations and the orbits fan out into the tilted planes they really occupy — Pluto's 17°, Mercury's 7°, the quiet disagreement the flat diagram hides. EVERYTHING SPINS. Each body turns on its own axis, at its own rate, at its own lean: Venus backwards, Uranus on its side, the Moon locked forever facing home. HALLEY'S COMET TAKES AN EPIC RUN. Seventy-six years, out past Neptune and back, on an orbit so long and lopsided it barely belongs on the same diagram. SWIM THROUGH TIME. Watch conjunctions close, planets loop backwards through retrograde, Saturn's rings turn edge-on and all but vanish, Venus cross the face of the Sun. JUMP TO A PRECISE ECLIPSE and see how tight the Moon's shadow really is — a couple of hundred kilometres of darkness, brushing over the Earth for a few minutes, landing on the real map where it really lands. On 2 August 2027 it crosses southern Spain and Egypt; jump there and watch. And when you want the honest picture of size: one tap drops everything to true scale, where the planets become the specks they are, and the emptiness is the whole photograph. HONEST BY CONSTRUCTION. Every solar-system app draws a picture; this one also shows you the picture's error. Bodies are enlarged so you can see them at all — and the exact factors are printed on screen the entire time you're looking (Sun ×24, bodies ≤×750). Positions are computed on your device from orbital elements, so the app also tells you when it stops being trustworthy: good near today, approximate centuries out, illustrative in the deep millennia. Even the maps admit their gaps: Miranda is half blank because humanity has only ever seen half of it. WHAT IT DOESN'T DO. No account. No ads. No subscription. No analytics — App Privacy is "Data Not Collected". Nothing leaves your phone. Free, with one optional purchase that opens 10,000 years in each direction.