This Java applet shows the location in the sky of the Sun and Venus for any given location on Earth. The date and time can be set for past and future years, and the program indicates the rise, set, azimuth, and elevation for both celestial bodies. Details about Venus also include elongation from the Sun, distance from the Earth, and past and future transits across the Sun as seen from Earth (date, ... Full description.

Sky View Cafe is a Java applet for viewing graphical and numerical astronomical information including star charts, a 3-D orrery, displays of the moons of Jupiter and Saturn, an astronomical events calendar, and an ephemeris generator. The source code for the Sky View Cafe Java applet is provided. There are also photographs of the 2001 Zambia total solar eclipse. Full description.

This applet tests the sensitivity of a barotropic model to time step, grid spacing, and initial conditions. The site explains the CFL (Courant-Friedrichs-Lewy) criterion (that the speed of fastest winds in the model must be less than or equal to grid spacing divided by the time step) and how a finite-difference weather prediction model blows up if this criterion is not met. The user of this applet ... Full description.

This applet simulates a world where there are two kinds of plants: white daisies and black daisies. These plants, along with bare ground, cover the planet. There is a fixed death rate, as well as a fixed value for horizontal temperature transport. The plants, however, have different albedos. The user sets the luminosity and when a steady state is reached, the percentage of cover by the daisies and ... Full description.

This applet determines the height of the base of any cumulus cloud that might form due to convection, when the temperature and dew point sliders are adjusted. The applet displays clouds between 1000 and 10,000 feet. Full description.

This applet tests the balance of the frictional, pressure gradient, and Coriolis forces with the wind. The applet displays vectors for these forces and the wind as the latitude, friction (drag), and pressure gradient are adjusted. Full description.

This applet allows users to test their understanding of the basic geostrophic wind equation. Instructions are given on how to adjust the friction force (drag), pressure gradient force, and latitude in order to test the equation. There are also other instructions and questions to learn about the balance of Coriolis, frictional, and pressure gradient forces and the wind. Full description.

This applet enables students to learn about the balance of Coriolis forces and the wind. Students will explore the direction and magnitude of the Coriolis force as a function of latitude and wind speed. The horizontal and vertical components of the Coriolis force as well as the total Coriolis force are graphically displayed as changes are made to the wind speed and direction or latitude. Full description.

This applet explores the interaction of two waves, allowing users to control both the period and amplitude as well as the phase between the two waves. Students can try to get the sum to be zero when the two component waves have a nonzero amplitude. Full description.

This applet explores the weighting function, which provides information on what regions of the atmosphere affect satellite measurements. The exercise investigates how changes in the line shape, gas concentration, and vertical distribution of the gas impact the weighting function. The temperature dependence is neglected. Full description.