Planetary 2D

Planetary is an animated interactive 2-dimensional model of the Solar System for iPhone & iPod Touch.

Featuring:
• All the planets and their major moons
• Accurate orbit scale and speed
• Accurate relative planet & moon sizes
• Precise transport controls
• Freely roam around the Solar System
• Zoom in and out (0.2 AU to 136 AU)
• Date & time display with date picker
• Accurate planet positions for any date
• Planet rotation indicator
• Location display with heliocentric latitude, longitude and distance
• Truescale mode

更新履歴
Performance enhancements:
• Complete rewrite of the rendering engine using OpenGL
• Significant performance improvement, with smoother animation and more responsive panning and zooming

New features:
• Orbit paths can be set to indicate whether the planet's orbit is above or below the plane of the ecliptic
• A crosshair is displayed when panning or zooming so you can precisely zoom in on objects

Display enhancements:
• Orbit trails are now rendered as smooth gradients
• Moons now show orbit paths or trails like the planets
• Planets now have a subtle glow

Bug fixes:
• Fixed a bug where objects would shift in the display when reaching maximum zoom

Other changes:
• Option to choose between Kepler and pure circular orbits has been removed - Kepler orbits only
• Orbit path button now toggles between Orbit paths -> Orbit Trails -> No orbit paths; orbit trail option removed from options screen