Spin

Reading the field

Every phase uses one shared clock. Axis angle is obliquity to the world's own orbit; signed sidereal periods preserve retrograde motion. Each equirectangular map is projected onto a sphere and advances by its world's signed sidereal angle. The surface-projected ._. mark identifies the map's zero-hour longitude; it is a visual guide, not a tracked geophysical feature.

Titan and Europa remain visible, but their axes are dashed until a compatible obliquity record clears the data gate.

Pluto's encounter-opposite hemisphere has incomplete coverage. Uranus uses a longitude-neutral zonal approximation because it has no mappable solid surface; its guide still records the resolved phase.

Records

Dataset 0.1. Rotation: NASA/JPL and IAU/WGCCRE. Obliquity: NASA NSSDC archived fact sheets. Sphere maps and static fallback portraits:

• Mercury MESSENGER global color mosaic — USGS Astrogeology · fallback: Mercury globe — NASA/JHUAPL/Carnegie Institution of Washington
• Venus global radar texture — NASA 3D Resources · fallback: Venus radar-data globe — NASA/JPL
• Earth global texture — NASA 3D Resources · fallback: Blue Marble, March 2014 — NASA/GSFC
• Mars global texture — NASA 3D Resources · fallback: Mars global mosaic — NASA/USGS
• Jupiter cylindrical texture — NASA 3D Resources · fallback: High-resolution Jupiter globe — NASA/JPL/University of Arizona
• Saturn global atmospheric texture — NASA 3D Resources · fallback: Saturn, Cassini — NASA/JPL/Space Science Institute
• Uranus zonal texture from Voyager 2 — NASA/JPL-Caltech; Atlas derivative · fallback: Uranus, Voyager 2 — NASA/JPL-Caltech
• Neptune global atmospheric texture — NASA 3D Resources · fallback: Neptune, Voyager 2 — NASA/JPL
• LRO CGI Moon Kit color map — NASA/GSFC/SVS/Ernie Wright · fallback: Full Moon — NASA/GSFC
• Titan global texture — NASA 3D Resources · fallback: Titan natural-color composite, Cassini — NASA/JPL/Space Science Institute
• Europa global mosaic texture — NASA 3D Resources · fallback: Europa full disk, Galileo — NASA/JPL
• Pluto New Horizons cylindrical texture — NASA 3D Resources · fallback: Pluto color view — NASA/JHUAPL/SwRI