La pregunda más grande y más vieja del mundo:

 "¿Somos solos en el universo?"




Esta pagina esta dedicada a la búsqueda de una segunda tierra




Desde el año 1995 los astrónomos han encontrado más que 420 sistemas de planetas en el universo y mas que 500 planetas extrasolares. Aqui se puede leer las ultimas novedades de otras tierras en el universo.



Carnegie Institution of Science: "There could be one hundred billion Earth-like planets in our galaxy...". y Berkeley : "Earth-Sized Alien Planets May Be Surprisingly Common" or  "25% of Sun-like stars have Earth-like planets.. (and)...there could be even more Earth-size planets"




Posibles otras tierras en el universo:

 GJ 1214b

Kepler-22b . It orbits its star every 290 days.

SuperEarth GJ 667Cc

Gliese 581g (en cuestión, dudoso)



Gliese 581d

Gliese 163c

Tau Ceti f

Tau Ceti e

KOI -351

Kepler 186f

GJ 832c

Kepler 283c

GJ180c, GJ180b

Kepler 61b

GJ 422b


Kepler 298d

Kapteyn b

Kepler 174d

Kepler 296f

GJ 682c


Kepler 62f, Kepler 62e

Keppler 296e, Keppler 296f

 Kepler 438b

 Kepler 442b

Kepler 443b

 Kepler 440b

 Kepler 444(c,d)

These exoplanets are considered to be in the habitable zone and have a rocky composition:

Proxima Centauri b

Gliese 667 Cc



Wolf 1061c


Kapteyn b*



Trappist-1 has 6 planetes in the habitable zone

LHS 1140b

Ross 128b


For the first time an atmosphere has been detected on a planet  1.6 times the mass of Earth and 1.4 times the radius. The planet  GJ 1132b orbits a red-dwarf star 39 light-years away and is classified as a super-Earth.

 It seems GJ 1132b has an atmosphere that is opaque to infrared but transparent to other wavelengths. It is assumed that the atmosphere may be rich in oxygen and methane. It could be a water planet with a steam atmosphere.





Aqui se puede leer como comenzó la busqueda de planetas extrasolares .

Simbad database, Strasbourg

 CDS Portal, simultaneous search  in Simbad, Aladin and VizieR

The exoplanets catalog maintained by Jean Schneider (CNRS-LUTH, Paris Observatory)

The Transiting Planets (Frédéric Pont)

Stellar data base

Solstation becomes more and more useful

Celestia The free space simulation that lets you explore our universe in three dimensions. Celestia runs on Windows, Linux, and Mac OS X.

Image Analysis Competitions


Fits Liberator is now a stand alone application (Photoshop since Version 3.0 no more required) pdf here, downloads here

Photometric Software for Transits (PhoS-T) rather archaiac: only available per email-!

Astronomical Image Browsers


Solar weather browser