You can create KML files that display objects in the sky, such as stars, constellations, planets, the Earth’s moon, and galaxies. This appendix explains how to create a KML file to display celestial data in an Earth browser that supports Sky data, such as Google Earth or Microsoft’s WorldWide Telescope. Specifically, you’ll need to do the following:
Add a hint attribute to the <kml> element at the beginning of the KML file to indicate that the file contains sky data, not Earth data
Convert celestial coordinates to Earth-based KML coordinates
The Google Earth user can control when to switch to Sky mode, using the View > Switch to Sky menu option or the Sky button in the user interface. When the user switches to ...