This interactive program calculates the position of several prominent objects in the Martian sky, as seen from the projected landing sites of Beagle 2, MER-A (Spirit), MER-B (Opportunity) and the Phoenix North Polar Lander at any time from Jan 1st, 2000 to Dec 31st, 2009. This includes the two moons, Phobos and Deimos, the Earth and the Sun. ... 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 . ... TIME . ... Page Credit : Agnieszka Drewniak Programming Credit : Apostolos Christou ...

A completely new possibility of Fortran 90 is recursion. Note that it requires that you give a new property RESULT for the output variable in the function declaration. ... Here follows two examples, first recursive calculation of the factorial, then recursive calculations of the Fibonacci-numbers. ... The listings of the routines follow, the output variables are called FAC_RESULT and FIBO_RESULT , respectively. ... Not only functions but also subroutines can be recursive. ...