View Full Version : How Common are Terrestrial, Habitable Planets Around Sun-Like Stars?

2011-Sep-27, 09:50 PM
Once again news from the Kepler mission is making the rounds, this time with a research paper outlining a theory that Earth-like planets may be more common around class F, G and K stars than originally expected. In the standard stellar classification scheme, while these type of stars are somewhat similar to our own Sun [...]

More... (http://www.universetoday.com/89237/how-common-are-terrestrial-habitable-planets-around-sun-like-stars/)

2011-Sep-28, 05:05 PM
between 0.1 and 2.0 for a radius for "earthlike"?! Why?

It would seem much more accurate, especially with regards to "habitable" "Earthlike" planets to use something with much less variance (0.9 - 1.1 earth radius and mass). If observation and experience urges us to increase this scale later, it is not a difficult adjustment to make, but including everything from Pluto to the stripped core of a Jovian planet as "Earthlike" seems so distorted as to strip all of the meaning and significance from the term "earth -like."