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Mercury is the smallest planet in the Solar System, and it is the closest to the [[Sun]]. It orbits the [[Sun]] in 88 days. It can be seen from [[Earth]] only at sunrise and sunset. It is named for the Roman messenger god who was known as [[Hermes]] in Greek.
Mercury is the smallest planet in the Solar System, and it is the closest to the [[Sun]]. It orbits the [[Sun]] in 88 days. It can be seen from [[Earth]] only at sunrise and sunset. It is named for the Roman messenger god who was known as [[Hermes]] in Greek.
It was the study of this planet's orbit that [[Albert Einstein]] used to help confirm the theory of General Relativity.
It was the study of this planet's orbit that [[Albert Einstein]] used to help confirm the theory of General Relativity.{fact}
Mercury is also an element, number 80 in the periodic table. It is the only metal that is commonly found in liquid form.
Mercury is also an element, number 80 in the periodic table. It is the only metal that is commonly found in liquid form.
[[Category:Astronomy]]
[[Category:Astronomy]]