HEATKEYS

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

Sunrise, sunset, dawn and dusk times for the whole year in a graph, day length and changes in lengths in a table.

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.

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...

Accurate, rapid online simulation of high-resolution molecular spectra, and other spectroscopy tools for researchers, teachers and students.

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

Build It Solar will help people with Do It Yourself skills build solar projects that save money and reduce pollution. It is a "hands-on" site with detailed plans for solar projects including solar space heating, water heating, passive sola...