HEATKEYS

A little online application with interactive map that shows sun movement and sunlight phases during the given day at the given location.

The Solar Electricity handbook is a simple, practical book to using electric solar panels and designing and installing photovoltaic solar PV systems.

The NOAA Earth System Research Laboratory was formed to observe and understand the Earth system and to develop products, through a commitment to research that will advance the National Oceanic and Atmopsheric Administration

The Astronomical Applications Departmentof the U.S. Naval Observatory computes, from fundamental astronomicalreference data, the position, brightness, and other observablecharacteristics of celestial bodies, as well as the circumstancesof astronomica...

University of Oregon Solar Radiation Monitoring Laboratory Web Site

A comprehensive calculation website, which aims to provide higher calculation accuracy, ease of use, and fun, contains a wide variety of content such as lunar or nine stars calendar calculation, oblique or area calculation for do-it-yourself, and hig...

Sunlit Design Home Page

This site includes lots of information that is time and date related, such as yearly and monthly calendars, countdown counters and the world clock which shows current time in cities all over the world.