Mapa del sitio . ... El movimiento circular, sin embargo, necesita fuerzas para existir. Imagine que tiene una piedra amarrada a una cuerda y est movi ndola en c rculos de radio R (metros). ... Como su velocidad v es igual a la distancia que se mueve en un segundo, vemos que . ... Si tomamos el movimiento desarrollado en un momento muy breve , el trayecto AB cubierto es tan peque o que su curvatura se puede desechar, permitiendo ver el movimiento como si fuese en l nea recta, con una velocidad v . ...

... B ut today the space program in the United States is in trouble. ... If you want to see America's space program restored to its former glory, you can help. ... TPS is particularly active in promoting cooperative projects between NASA and the Russian space agency. ... For more information see The Planetary Society WWW page . The National Space Society promotes change in social, technical, economic, and political conditions to advance the day when people will live and work in space. ... Plea .. ...

Deimos . Mars II . Deimos [DEE-mos] (panic) is a moon of Mars and was named after an attendant of the Roman war god Mars. ... Some scientists speculate that Deimos and Phobos (the other martian moon), are captured asteroids; however, other scientists present arguments counter to this theory. Both Deimos and Phobos are saturated with craters. ... Orbital period (days) . ... Courtesy A.Tayfun Oner) . ... Topographic Map of Deimos . ... The leading side faces forwards in the orbit of Deimos. ...