Log In |
New User
|
Log In |
New User
|
Home
| About..
| Search..
|
This program shows which parts of the globe are in daylight, and which are in darkness. The position of the sun (projected on to the Earth) is shown as a yellow circle. Various locations around the world can be selected, and the date and time can be changed. For the currently selected location and the current date and time, information such as the number of daylight hours and sunrise/sunset times are shown in a panel on the right-hand side.
It is also possible to choose a "globe" view of the Earth, rather than the default "map" view, using the "View Mode" selector. In either mode, the map can be animated to show the passage of light and shadow across the surface of the Earth over time. The speed can be selected using the slider labelled "Time Step". In addition, if "globe" view is selected, there is an additional slider to control how quickly the view of the Earth rotates.
The program makes some approximations: The Earth is assumed to be a perfect sphere and its path around the sun a perfect circle. Therefore do not rely on the results to be totally accurate, they are intended as a guide only. In addition, I believe the globe view in particular may not be a true representation.
See Also:
Daylight - large version
DateInfo Applet
Recent comments
Cool!
This is quite good i didn't think it would be good coz' i have to do it for homework but it turned out to be facinating.
posted 2009-11-08 by Bethany
re: request
Thanks for your comment. Ideally I would like to have it plot moon and planets too. It may be a little difficult as the current simulation (sun only) repeats every year, whereas of course the moon and planets don't. Also the maths would be more complicated. However I will look into it.
posted 2007-12-12 by Admin
request
It is a wonderful programme. Actually i have one request. Can you put the positional path of all other planets like moon, jupiter, mercury, etc....along with sun position in the same programme... as it will help me in one of my students demonstration...Please kindly do it...thanks
posted 2007-11-28 by Jegan, INDIA
