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America's space program is at a turning point. After decades of global primacy, NASA has ended the space-shuttle program, cutting off its access to space. No astronauts will be launched in an American craft, from American soil, until the 2020s, and NASA may soon find itself... Read Full Overview

Neil deGrasse Tyson is a rare breed of astrophysicist, one who can speak as easily and brilliantly with popular audiences as with professional scientists. Now that NASA has put human space flight effectively on hold--with a five- or possibly ten-year delay until the next launch... Read Full Overview

La NASA esta en un punto critico; despues de decadas de supremaciamundial, cancelo su programa de transbordadores cerrando su acceso al espacio. Hasta 2020, ningun astronauta sera lanzado fuera de la orbita terrestre desde suelo estadounidense, y pronto su programa espacial podria... Read Full Overview

America's space program is at a turning point. After decades of global primacy, NASA has ended the space-shuttle program, cutting off its access to space. No astronauts will be launched in an American craft, from American soil, until the 2020s, and NASA may soon find itself... Read Full Overview