You can use these calculators to calculate daylight, solar eclipse, sun data, orbits, and more..

**Day & Night Applet
**

This Java Applet shows the day-and-night regions on a world map, the declination and Greenwich hour angle of the sun, the shadow of a vertical gnomon, and more.

**Daylight Applet
**

See the horizon at the selected location and time, or the word map showing day and night regions, or the sunshine hours per month.

**SolarEclipse
**

This interactive applet visualizes the total solar eclipse of 1999 August 11 in Europe.

**Sun & Earth Applet
**

This interactive applet displays the position of the sun on horizon for any date, time and location, and on a world map with day and night regions.

**Sun Clock Applet
**

This applet displays the times of sunrise and sunset for any location on a clock.

**Sun Data Applet
**

This applet computes the times of sunrise and sunset for any location, and more astronomical data which are updated every second.

**Sun Moon Map
**

This Java applet displays the position of the sun and the moon.

**Sun View Applet
**

The interactive Java applet displays the position of the sun (altitude and azimuth) for any date, time and location, the times of sunrise and sunset, and more.

**Sunrise & Sunset Applet
**

This applet computes the times of sunrise and sunset for any location.

**Sunshine Applet
**

An interactive Java applet displaying the hours of most intense sunlight and UV radiation for any location and time.

**Astro-Physical Calculator
**

Astro-Physical Calculator includes:
Scientific, Technical, Programming and Logic functions, Physical Constants, Astronomical Constants, Planetary Data

**Lunar Calculator
**

Lunar parallax calculator. Displays the moon's placement in the chart with both non-parallax and parallax corrections, the associated dasha/bhukti period, the date and number of days difference for the following dasha.

**Mercury Chaser's Calculator
**

To display the date, time, and distance of the maximum elongations of Mercury for a given year, enter the year in the box below and press “Calculate”.

**Orbits in Strongly Curved Spacetime
**

The display above shows, from three different physical perspectives, the orbit of a low-mass test particle. By clicking in the various windows and changing values in the controls at the bottom of the window you can explore different scenarios.

**Sun Table Calculator
**

Calculate the position of the sun for any location.

**javascript**