Facts about the Earth

Average Solar Distance 152 million km
Revolution Period 365.26 Earth days
Rotation Period 23.93 hours
Equatorial diameter 12,756 km
Gravitational Pull 9.8 meters per second per second
Natural Satellites 1     (Tell me more!)

The StarChild site is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/ GSFC.

StarChild Authors: The StarChild Team
StarChild Graphics & Music: Acknowledgments
StarChild Project Leader: Dr. Laura A. Whitlock
Curator: J.D. Myers
Responsible NASA Official: Phil Newman
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