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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
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
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
Sky context with stars , Milky Way and constellation lines
Satellite, planet, and ephemeris data are based on JPL and
NASA web sites, including
ISS space station model:
Astronomy Picture of the Day,
http://antwrp.gsfc.nasa.gov/apod/ap030714.html, for an animation based on EarthDay.
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.
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