Results tagged “Faint Young Sun”

Earth During The Faint Young Sun Era

Research supported in part by the NASA Astrobiology Program provides new insight into the 'faint young Sun problem.'

During the Archean eon, between about 3.8 billion years ago and 2.5 billion years ago, the Sun was about 20 to 25 percent fainter than it is today. With less sunlight to warm the Earth, the oceans should have been frozen over, but geological evidence suggests that this was not the case.

« Previous  1  Next »