... Mars and Venus will be close together, with a lovely waning crescent moon, and Spica not far away, tomorrow morning, 1 December. ... A rare and interesting Jovian 'mutual satellite event' will occur on the evening of 5 December, when Europa will partially eclipse Io, from 23h 55m 9s to 24h 00m 38s. If you carefully compare Io's brightness with that of Europa before the event, and then at mid-eclipse, you should see the drop in brightness. ... Clear Skies, Terry Moseley . ...

In addition to the four old program units: PROGRAM (that is the main program), SUBROUTINE, FUNCTION and BLOCK DATA , the new concept MODULE has been added, as well as some new things in the old units. ... POSITIVE NUMBERS ASSUMED TYPE(INTERVAL), INTENT(IN) :: A, B TYPE (INTERVAL) :: INTERVAL_MULTIPLICATION INTERVAL_MULTIPLICATION%LOWER = A%LOWER * B%LOWER INTERVAL_MULTIPLICATION%UPPER = A%UPPER * B%UPPER END FUNCTION INTERVAL_MULTIPLICATION FUNCTION INTERVAL_DIVISION(A, B) ! ...