Mercury is the next planet to the sun and so we are not able to observe it well because of the sun.
The only space craft that has ever gotten very close is the "Mariner 10."
The Mariner 10 got some information on Mercury but not much.
Mercury, during the day, gets up to 750 degrees!
So being so close to the sun it would never get cold? Not!
During the day it's unbelievably hot but at night it gets to be -300 degrees!
COLD!!!
Well the reason that Mercury doesn't have the layer of gasses called atmosphere to keep the heat in so at night it just keeps getting colder and colder and colder and colder.
Because Mercury doesn't have any atmosphere the sky is always gray.
The only space craft that has ever gotten very close is the "Mariner 10."
The Mariner 10 got some information on Mercury but not much.
Mercury, during the day, gets up to 750 degrees!
So being so close to the sun it would never get cold? Not!
During the day it's unbelievably hot but at night it gets to be -300 degrees!
COLD!!!
Well the reason that Mercury doesn't have the layer of gasses called atmosphere to keep the heat in so at night it just keeps getting colder and colder and colder and colder.
Because Mercury doesn't have any atmosphere the sky is always gray.
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