Directorios

Enlace: http://www.pbs.org/wgbh/nova/worlds/

Descripción: PBS NOVA Online.
«Our hunt for other worlds will find them--or exclude their existence--only after continued growth in our hunting skills, bigger telescopes, better precision spectrography, more exact study of wobbly images, and maybe new ideas. But it is worthwhile recounting the steps we could and did take to arrive here.»