'Summer solstices' presentation slideshows

IS1101 Nothing to Something

IS1101 Nothing to Something. Mr Goh Hock Leong. Content. Celestial Sphere declination, right ascension vernal equinox, autumnal equinox, winter solstice & summer solstice celestial poles, celestial equator, ecliptic Seasons. Movement of Earth.

604 views • 45 slides

The Incas

518 views • 18 slides

The Mayan Calendar- December 21, 2012

The Mayan Calendar- December 21, 2012. By: Sarah Morrison. Calendar. Long Count: uinal(1 uinal = 20 kin = 20 days) tun(1 tun = 18 uinal = 360 days = approx. 1 year) katun(1 katun = 20 tun = 7,200 days = approx. 20 years) baktun(1 baktun = 20 katun = 144,000 days = approx. 394 years)

195 views • 6 slides