Mercury

Mercury is the closest plannet to the sun due to it proximity, it is not always seen except during twilight.

For every two orbits of the sun, mecury completes three rotations about it axis and up until 1965 it was though that it was same site of the mercury that constantly face the sun. Thirteen time a century , Mercury can be observe from earth passing accross the face of the sun in an event call transit.

Mercury fast

• Diameter: 4,879 km
• Mass: 3.30 × 10²³ kg
• Moons: None
• Orbit distance: 57.9 million km (from the Sun)
• Orbit period: 88 Earth days
• Surface temperature: −173°C to 427°C
• First record: 14th century BC
• Recorded by: Assyrian astronomers

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