The answer to the oldest and most often asked question of mankind:

"Are we alone in the universe?"

"The discovery of life on another planet is potentially one of the most important scientific advances of this century, let alone this decade, and it would have enormous philosophical implications."
- National Research Council



Get your place in history! It never was easier...





Conditions for life on extraterrestrial planets


This site is dedicated to the search for a second earth

You'll find here always the latest news what concerns habitable extrasolar planets. Since this is one of the oldest questions of mankind you should bookmark this site and add this site to your favorites.

Carnegie Institution of Science: "There could be one hundred billion Earth-like planets in our galaxy...". and Berkeley says: "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"
The more planets there are the greater the odds that life exists somewhere else in the universe.







Planets todays astronomy thinks are worth a second look  - but don't get too excited because none of these pocesses a moon of the size of our moon (to our knowledge today) which is essential for live on a planet:

Read also: Exoplanets on the cheap


GJ 1214b
Kepler-22b . It orbits its star every 290 days. Keppler 22d

SuperEarth GJ 667Cc (e,f)

Gliese 581g (newer investigations seem to show that 581g is not existant)


Gliese 581d

HD 40307g

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 is supposed to posses 6 exoplanets in the habitable zone (7 total)

LHS 1140b

Ross 128b


(Some are stll candidates. Some seem to be non existant.)

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.

How and why the search for extrasolar planets started you can read here.

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

Atlas of the Universe

Solstation becomes more and more useful

Still useful: Exoplanets Rising: Astronomy and Planetary Science at the Crossroads (March 29 - April 2, 2010)

keep an eye on this site:



The following is mostly in C++ :

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

State of the art modeling of stellar and planetary atmospheres:


FÁRGO, RVLIN, ExoFit....:

FARGO, Solves Navier-Stokes and continuity equations for a Keplerian disk subject to the gravity of the central object and that of embedded protoplanets and


MESS (Multi-purpose Exoplanet Simulation System):   and


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-!

Habitable exoplanets:  and


Free astrophysics software with source code (No comment on quality)

GPS-library and  AA+ v1.45 A class framework for Computational Astronomy etc

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



Radiative Transfer Code for a Plane Parallel Multiple Scattering/ Absorbing Atmosphere and  Kernel Functions for Radiative Transfer in Spectral Lines in C/C++ code. Homepage:

Astronomy Software

Important addres for all who are interested in games:


Soon you'll find much more code here ( got to scan my hard disks...)