Atmosphere

Further to yesterday's post and image about space and our place in the universe is this little drawing showing the layers of atmosphere which act as a shield and make our Earth a Goldilocks planet on which life can thrive - not too hot and not too cold, its just right.

Though in the Goldilocks tales its at that point in the story that the bears turn up and everything goes a bit pear shaped so hopefully not a very accurate analogy.