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http://star.arm.ac.uk/astropark/comets.htm.
http://star.arm.ac.uk/astropark/comets.htm.
1. Armagh Astropark: Comets
... Solar System . ... Sun . ... Comets . ... Some get thrown out of the solar system forever, whereas others end up on yet smaller orbits, visiting the inner solar system fairly frequently - such as comet Halley. ... When a comet moves into the inner solar system, this is heated by the Sun, and the ices turn into gas which forms the head or coma of the comet, which may be hundreds of thousands of kilometres across and visible from Earth. The most striking part of many active comets is the tail . ...
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Ссылки http://star.arm.ac.uk/~csj/pus/astropark/comets.htm -- 10.1 Кб -- 23.05.2002
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2. http://star.arm.ac.uk/ext_no.html
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Ссылки http://star.arm.ac.uk/ext_no.html -- 1.3 Кб -- 24.07.2012
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3. Notables in the transition from Fortran 77 to Fortran 90
... The old source code form, which is based on the punched card, and now called fixed form and the new free form. These two forms may not be mixed independently but must be separated at the compilation; an old program, (one or several program units in the form of a main program, subroutines or functions), which is compiled in free form, has the possibility to give a different result compared with earlier when it was compiled with fixed form, compilation errors are possible. ... Comments. ...
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Ссылки http://star.arm.ac.uk/f77to90/c1.html -- 4.1 Кб -- 17.04.1996
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