This is the Message Centre for
D:/ Sidereal day./
Researcher 805730 Started conversation Aug 31, 2004
Sidereal day: The time required for a complete rotation of the earth, measured as the interval between two successive meridian transits of the vernal equinox, or 23 hours, 56 minutes, 4.09 seconds in unit of mean solar time.
Key: Complain about this post
D:/ Sidereal day./
More Conversations for
Write an Entry
"The Hitchhiker's Guide to the Galaxy is a wholly remarkable book. It has been compiled and recompiled many times and under many different editorships. It contains contributions from countless numbers of travellers and researchers."