TITLE: THE OBSERVATORY
PROMPT: Design 'THE OBSERVATORY', a stargazing instrument: a domed observatory interior (very dark) with a huge telescope aimed through the slit; the sky is a pannable, zoomable star chart (procedural stars with realistic magnitude distribution, color temperature, and twinkle) with the ecliptic line, planet wanderers, and a Milky Way band of density. Palette: near-black sky, platinum starlight, one red flashlight mode (preserving night vision). Interactions: drag to pan and scroll to zoom the chart (from constellation view to deep-sky clusters); constellations toggle as drawn stick figures with names (Orion, Cygnus, Lyra) and their myths on hover; the telescope crosshair locks a target and shows a data card (magnitude, distance); SEARCH types a name to slew the view; shooting stars streak rarely. Hushed, infinite, precise.
DESCRIPTION: A planetarium instrument under a domed vignette with a silhouetted telescope: 2,300 procedural stars seeded with a mulberry32 PRNG — realistic magnitude distribution (many faint, few bright), spectral color classes from blue-white to orange, and per-star twinkle — plus a diagonal Milky Way band of dense faint stars and haze. Five constellations (Orion, Cygnus, Lyra, Ursa Major, Scorpius) render as dashed stick figures with labels; five named supergiants (Betelgeuse, Rigel, Vega, Deneb, Antares) and four deep-sky objects (M42, M31, M13, M57) open data cards with magnitude, distance, and a line of myth. Drag to pan, scroll to zoom (0.4×–6×) with live RA/Dec/FOV readout; search slews the view with a cubic glide; meteor shower button and rare ambient shooting stars; a red-light mode preserving night vision re-dyes the whole chart.
TECHNIQUES: mulberry32-seeded procedural catalog with magnitude/color-temperature sampling, world-space pan/zoom projection with unproject hit-testing, magnitude-limit rendering tied to zoom, diffraction spikes on bright stars, Milky Way density band with gradient haze, dashed constellation figures with labels, radial-gradient deep-sky glows, glide slew search, meteor streak particle system, night-vision red mode.
INTERACTION: Drag and scroll to explore; click named stars or deep-sky objects for data cards; type a name (orion, vega, m31…) and press Enter to slew; toggle constellations, deep sky, red light; fire a meteor shower.