âClouds cause warming, and they cause cooling on Earth,â said Abbot, an assistant professor in geophysical sciences. âThey reflect sunlight to cool things off, and they absorb infrared radiation from the surface to make a greenhouse effect. Thatâs part of what keeps the planet warm enough to sustain life.â - See more at: http://news.uchicago.edu/article/20...ts?utm_source=newsmodule#sthash.0HYqoLqr.dpuf since the study cited by the article... http://iopscience.iop.org/2041-8205/771/2/L45/ hey fc and stu... this study has three main authors does that mean the consensus is down to 93 or 94 %. What a bunch clowns you agw nutter liars are turning out to be... so quickly. The habitable zone (HZ) is the circumstellar region where a planet can sustain surface liquid water. Searching for terrestrial planets in the HZ of nearby stars is the stated goal of ongoing and planned extrasolar planet surveys. Previous estimates of the inner edge of the HZ were based on one-dimensional radiative-convective models. The most serious limitation of these models is the inability to predict cloud behavior. Here we use global climate models with sophisticated cloud schemes to show that due to a stabilizing cloud feedback, tidally locked planets can be habitable at twice the stellar flux found by previous studies. This dramatically expands the HZ and roughly doubles the frequency of habitable planets orbiting red dwarf stars. At high stellar flux, strong convection produces thick water clouds near the substellar location that greatly increase the planetary albedo and reduce surface temperatures. Higher insolation produces stronger substellar convection and therefore higher albedo, making this phenomenon a stabilizing climate feedback. Substellar clouds also effectively block outgoing radiation from the surface, reducing or even completely reversing the thermal emission contrast between dayside and nightside. The presence of substellar water clouds and the resulting clement surface conditions will therefore be detectable with the James Webb Space Telescope.