Update log
What changed and when, newest first — new features as well as data corrections and article updates. Report errors on the contact page; confirmed fixes are noted here.
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A new blog — observing notes and stories about the sky, one post a day (in Korean first)
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Interstellar view: 33 more planetary systems (Teegarden’s Star, Barnard’s Star, Gliese 667 C … 78 in all), exoplanets in search (pick one to fly there with its orbit in view), fixed planets and habitable zones vanishing at some angles when zoomed in (Proxima b and others) and the zoom limit, close-ups and the space tour now turn to show orbits, and black holes are circled slowly around their discSee it →
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New Guides section — 3 guides to the simulators, 5 on observing basics and 4 on terms and concepts (stargazing basics, finding north, moon phases, seasonal constellations, magnitudes, light-years, how eclipses work …), plus an introduction, how-to and FAQ on the home pageSee it →
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Interstellar view: Alpha Centauri and Proxima no longer appear twice (distant companions stay at their real positions and hold still when zoomed out); tap a star or exoplanet inside a zoomed-in system to select it and see its type, size, temperature, orbit and habitable-zone cardSee it →
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Interstellar view: neutron stars at a 10,000 km scale (long polar jets from afar, a large star up close), nebulae, clusters and galaxies shown face-on and larger, smaller exoplanets with type-specific looks (habitable, scorched, frozen, cold gas), danger zones labelled with their criterion plus habitable zones (the 1 g zone is gone), and distance labels kept off objectsSee it →
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Three new news articles (JUICE's second Earth flyby, Tianwen-2 reaching asteroid Kamoʻoalewa, Hayabusa2's Torifune flyby); updated MMX launch time, Roman's first weeks, Voyager 1's one-light-day moment and BepiColombo and Europa Clipper schedules; the postponed Chang'e 7 removed from the simulatorSee it →
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Interstellar view: 45 famous multiple-star and planetary systems (Sirius, Castor, Algol, TRAPPIST-1, Kepler-16 …) whose members orbit on real 3D paths when you zoom in, danger and 1 g zones, black-hole size comparison by event horizon and accretion disk, and 8 new object pagesSee it →
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English pages no longer describe the sky from Korea: visibility is now given for London, New York and Sydney with times in UTC; awkward literal phrasing cleaned up in Korean; 30 location and visibility facts corrected after a full re-checkSee it →
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Orbit view: a photographic Pluto map with Pluto centred when you zoom in, corrected moon-system framing for Mars and Pluto, probe cards with description, figures and mission timeline, rotation axes over surface maps, and the background Milky Way on by default without stutterSee it →
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In all simulators, closing the info card keeps the selection; an 'Info | ✕' pill at the bottom right reopens it or clears the selectionSee it →
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Interstellar view: background galaxies drawn as real galaxy shapes, Local Group dwarfs in their true distribution, balanced brightness for nebulae seen edge-on, a zoom-out before tour walks, and a cleaner journey captionSee it →
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Interstellar view: black-hole jets now stream out as beams from outside the event horizon, and companion stars are labelled with their name and typeSee it →
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Orbit view: zooming into the Sun stops at a 200,000 km view and eases back to the whole Sun when you let goSee it →
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Interstellar tour: step-by-step flight captions with live distance and speed, destination notes on approach, plain-language figures (N× the Sun), and controls that stay at the bottom when pausedSee it →
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Clearer wording on object pages and news articles, fact and wording corrections, and dates and figures brought up to dateSee it →
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Orbit view: a Sun closer to true size with fixed rays and a lens flare, and the Milky Way on the same sky sphere as the stars; a smaller Sun in the interstellar viewSee it →
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Fact corrections on object pages and news articles; Artemis II/III and Starship Flight 14 (first orbit) updated with what actually happenedSee it →
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Orbit view: a realistic Sun with surface detail and rays, four-step close/far framing for planets with moons, and easier moon picking; interstellar view: three-way size comparison and zoom-out on deselectSee it →
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Tap an orbit line to select its body; host galaxies, companion stars and mass streams around black holes and pulsars plus route captions in the interstellar tour; cleaner reading layout for object pages and articlesSee it →
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Bylines, review and update dates on articles and object pages, an editorial policy section, today's picks on the home page, and this update logSee it →
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Interstellar 3D: the Milky Way sphere, nebula/galaxy photos and the galactic disk now render on the GPU — no more seams or shimmer, and the cinematic loop is no longer capped at 25 fpsSee it →
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Three-stage station transitions in the interstellar tour, ray-traced black-hole close-ups, redrawn Cepheus and Hercules art, and a sky-dome perspective option in the sky viewSee it →
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Object pages reorganised by kind of object, fuller news articles, and traditional star names (Big Dipper, the 28 lunar mansions …) searchableSee it →
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Sunrise, sunset, moonrise and moonset with rising bearings (/sun) — 88 cities, any date, linked to the sky path viewSee it →
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Selecting the Sun or Moon in the sky view now draws its 24-hour path; overlapping objects open a picker; surface-map lighting and tidal locking corrected in the orbit view; Serpens drawn as its two halvesSee it →
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Info card in the orbit view with close/far framing, Earth clouds and atmospheric scattering, surface maps for 28 moons, and constellation art completed for all 88 constellationsSee it →
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Constellation lines audited (bright stars added to 35 figures), photographic surface maps in the orbit view (Pro), and constellation artwork over the stars (Pro)See it →
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Interstellar 3D released — true distances from Neptune's orbit to Andromeda, six tour routes, and shareable custom journeysSee it →
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Milky Way alignment calibrated, three-stage deep-sky photo loading, and lighter default labelling in the sky viewSee it →
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Fuller text on the main news articles, list-page introductions, and the /e/ short links repairedSee it →
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The sky-view Milky Way now uses the ESO panorama (WebGL), with continuous eclipse glareSee it →
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Deep-sky catalogue expanded to 245 objects (quasars, pulsars, exoplanet systems), with lore for stars and deep-sky objectsSee it →
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Per-view help and step-by-step tutorials for the sky, orbit and interstellar viewsSee it →
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Structured data, question-style summaries and source lines on object pages; IndexNow notificationsSee it →
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First pass removing leftover Korean text from the English interfaceSee it →