New 'Sky: zodiac · planets' layer (Space, default off). All computed, no data:
- 12 zodiac signs labeled around the ecliptic ring
- Sun & Moon from Cesium's Simon1994 model, 5 naked-eye planets from Schlyter's
low-precision series — correct directions, verified (Sun sits in the right
sign for the date, planets hug the ecliptic)
- placed in the INERTIAL frame (CallbackProperty × ICRF→Fixed each frame) so the
sky stays star-locked while the globe rotates; distances compressed to one
display ring beyond GEO so they're visible when zoomed out
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
