The amount of time it takes a planet to make one turn on its axis is called a __________. The amount of time it takes a planet to travel once around the sun is called a ____________.
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In the search for extrasolar planets that could support life. Scientists state the planet must be in the ‘Goldilocks’ zone – i.e. not to near and not to far from the planet’s sun. So the temperature of the surface of the planet is in the correct range to allow for the presence of liquid water (one of the main requirements for life).
My question is what are all of the other requirements that have to be in the ‘Goldilocks’ zone to allow for the development of life. Such as Gravity, Oxygen levels etc etc.etc. and what are the chances of this occuring?
