Georgia Department of Education
Ga Virtual Learning: Astronomy: The Earth
In this interactive tutorial students will learn what causes the seasons, diurnal cycles and how the constellations move through the sky. Learn we are able to see other planets and how astronomical events affected life on the Earth.
NASA
Nasa: From Stargazers to Starships: The Calendar
A lesson plan that gives an overview of solar and lunar calendars, their history and lore. Also, of the day and the month, and their relations to the rotational period of the Earth and the orbital period of the Moon.For versions in...
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Astronomy: Sidereal Solar Day
A computer based simulation demonstrating the difference between a sidereal day and a solar day.