• For those who may be intrigued by the possibilities that depend on the various estimates of the expansion rate of the universe and its density, or especially by the reintroduction of a "Cosmological Constant", there is a software program called "Age of the Universe" which is based on the Friedmann equation. Written in Q-Basic by members of the Department of Physics at West Texas State University. The program can be downloaded free from the Sky & Telescope Magazine astronomical software library. To run the program after downloading and saving the file, simply switch into the MS-DOS Q-Basic utility, load the program, enter a Hubble parameter (Ho), a density factor (Omega #), and any chosen Cosmological Constant (Lambda omega) and the program will graph the results in terms of the estimated age of the universe (past and future) with a curve indicating whether the results will be "open" or "closed".

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