Back to Software List earthDay Reference Sheet earthDay focuses on exploring the spatial environment surrounding the Earth, and provides a variety of ways of looking at the Earth, the moon, the artificial satellites, and the planets on a particular day at a particular time. 　 　 Download: Binaries and documents 　 FEATURE HIGHLIGHTS: The Earth, Moon, and Sun with correct lighting Visualization of the current time and day over the surface of the Earth to see the effect of the International Dateline. Display of a wide selection of Earth-orbiting artificial satellites, including color coded satellite functions and a 3D model of the International Space Station. Accurate simulation of umbra, penumbra, and Solar Eclipses. By turning on the various eclipse display options and selecting a date and time during an eclipse, one can get a very compelling visualization of the eclipse geometry. It is possible to look either up at the eclipse itself, or down at the shadows traversing the surface of the Earth. Landmarks on Earth: major cities, time zones, flight paths, etc. Planetary trajectories and simulation of retrograde motions with precise time control. Sky context with stars , Milky Way and constellation lines 　　 　 Data Sources: Satellite, planet, and ephemeris data are based on JPL and NASA web sites, including http://www.jpl.nasa.gov/solar_system/planets, http://ephemeris.com, http://ssd.jpl.nasa.gov/horizons.html, and http://www.celestrak.com/NORAD/elements/. ISS space station model: http://spaceflight.nasa.gov/gallery/vrml/station/ See also Astronomy Picture of the Day, http://antwrp.gsfc.nasa.gov/apod/ap030714.html, for an animation based on EarthDay. Credits: Software development lead: Philip Chi-Wing Fu. Additional software: Yinggang Li. Documentation: Yinggang Li, Philip Chi-Wing Fu, Andrew Hanson, Priscilla Frisch. Supported in part by “Journey of the Sun” NASA grants NAG 5-8163, NAG 5-13558, NAG 5-11999, awarded to the University of Chicago with subcontractor Indiana University. 　 Back to Software List