The Habitable Zone Gets Poked, Tweaked and Stretched to the Limits

For more than 20 years now -- even before the first detection of an extra-solar planet -- scientists have posited, defined and then debated the existence and nature of a habitable zone.  It's without a doubt a central scientific concept, and  the idea has caught on with the public (and the media) too.  The discovery …

The Habitable Zone Gets Poked, Tweaked and Stretched to the Limits

For more than 20 years now -- even before the first detection of an extra-solar planet -- scientists have posited, defined and then debated the existence and nature of a habitable zone.  It's without a doubt a central scientific concept, and  the idea has caught on with the public (and the media) too.  The discovery …

On Super-Earths, Sub-Neptunes and Some Lessons They Teach

Part 1 of 2 When the first exoplanet was identified and confirmed 20 years ago, there was enormous excitement, a sense of historic breakthrough and, with almost parallel intensity, sheer bewilderment. The planet, 51 Pegasi B, was larger than Jupiter yet orbited its parent star in 4 days. In other words, it was much closer …