Go to Armagh Observatory main Leonid page (including Leonid links) . ... In 2002 November the Earth will pass near the trails released at the 1866 and 1767 returns, i.e. 4 revolutions and 7 revolutions of the comet ago. The Earth's passage right through the centre of trails is associated with the most spectacular meteor displays (studies show that, as well as how close to the centre of the trail you are, the strength of the display also depends on how far along a trail's length you are). ...

... We now also have the possibility to write our own generic functions or subroutines. ... PROGRAM SWAP _MAIN IMPLICIT NONE INTEGER :: I, J, K, L REAL :: A, B, X, Y CHARACTER :: C, D, E, F INTERFACE SWAP SUBROUTINE SWAP _R(A, B) REAL, INTENT ( INOUT ) :: A, B END SUBROUTINE SWAP _R SUBROUTINE SWAP _I(A, B) INTEGER, INTENT ( INOUT ) :: A, B END SUBROUTINE SWAP _I SUBROUTINE SWAP _C(A, B) CHARACTER, INTENT ( INOUT ) :: A, B END SUBROUTINE SWAP _C ...