Top Scientific Astronomy
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.
See the horizon at the selected location and time, or the word map showing day and night regions, or the sunshine hours per month.
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.
An interactive Java applet displaying the hours of most intense sunlight and UV radiation for any location and time.
Astro-Physical Calculator includes: Scientific, Technical, Programming and Logic functions, Physical Constants, Astronomical Constants, Planetary Data
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.