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The Habitable Zone

The Habitable Zone

by Ludwig Scheibe (TU Berlin), December 2024 One of the most exciting questions in the field of exoplanets is undoubtedly: is there life as we know it on any of these alien worlds?  It is a question that people have been asking since ancient times. Now, in the age of...
Historical context

Historical context

The first confirmed extrasolar planets were found in 1992 by Aleksander Wolszczan and Dale Frail, who discovered two planets around the pulsar PSR B1257+12, later named Phoebetor and Poltergeist.  Then, in 1995, the first exoplanet around a Sun-like star followed,...
Astrometry

Astrometry

by Ludwig Scheibe, February 2025 The most common and most succesfully methods of finding planets around other stars are the transit and radial velocity methods. Using those, humanity has discovered thousands of exoplanets and is still discovering more. But both of...