What would happen to the earth, biologically, if the sun disappeared?
The earth would spin off into space and everything would freeze solid, including the atmosphere. So there’d be no wind. The only exception might be some liquid water around undersea geothermal vents, which could continue to support some multicellular life forms. You’d also occasionally get some local atmosphere (unbreathable by most multicellular life) expelled from volcanoes above sea level, but that would freeze fairly quickly. Undersea vents tend to close off after a few decades, however, and although new ones are likely to open up, there would be no way for life forms to colonize the new vents. So even the life at the vents would go extinct inside 100 years or so. After that the only life left on Earth would be deep-living archaea and bacteria, which could keep going for thousands of more years by metabolizing the heat from the earth’s core and certain chemicals in its crust. http://www.chemlin.
