The same stars. Four ways of seeing.
Asteria is a curated atlas of 24 constellations: twelve zodiac constellations and twelve northern and southern patterns. Choose a pattern on the map, or browse the collection to discover its stars and stories.
Make yourself at home
Drag the sky to look around. Scroll, pinch, or use + and − to zoom. The map also accepts arrow keys. Use the left toolbar for constellation lines, a coordinate grid, navigation stars, and mythic figures. Use the Stars–Myth slider to fade the selected constellation’s illustration into view; stars and their positions remain unchanged. Press / to search. Save favourites with the bookmark beside a constellation’s name. On mobile, use Map, Read, and Expanded on the reading sheet; swipe its handle to change height.
Take a curated journey
Open Journeys to follow The Greek heroes, Finding your way at sea, or A journey around the zodiac. Each stop opens the relevant knowledge layer. Pause to explore freely; return to the chooser to resume or start over. Stop progress and completion are saved in this browser when local storage is available.
The atlas and your local sky
Stars use catalogued equatorial coordinates, rendered with a stereographic projection. The main map is a timeless exploration view. Visible tonight adds a local horizon chart and guide-star directions for your chosen coordinates and time, with daylight and twilight guidance. North and south refer to celestial hemispheres. The atmospheric blue background is decorative; connecting lines are traditional guides, not official boundaries. Star distances are rounded estimates and refer to individual stars, not entire constellations.
Stories, symbols, and the sea
Mythology follows selected Greek and Roman retellings; many alternative traditions exist. Astrology is presented as cultural symbolism, not established science. Its twelve equal tropical signs are different from the unequal astronomical constellations. Navigation notes introduce historical techniques; this atlas is not a navigational instrument.
Constellation illustrations
Figures by Johan Meuris, from Stellarium’s Western sky culture. They are artistic interpretations, anchored to catalogue stars; they are not official constellation boundaries. The original image files remain unchanged. Asteria projects them onto the sky and blends their brightness. Artwork sources and licences ↗
Sources & further exploration
Each constellation includes a further-reading link. Editorial summaries are original; star names and distances are approximate. Fonts: DM Sans and Cormorant Garamond, SIL Open Font License. All app assets are local. External source links require internet access.
Your saved constellations stay in this browser. No accounts. No tracking. Just the sky.