1️⃣ Mercury

Mercury is the smallest and innermost planet in the Solar System. Its orbital period around the Sun of 87.97 days is the shortest of all the planets in the Solar System. It is named after the Roman deity Mercury, the messenger of the gods.

Mercury Astronomical symbol of Mercury
Mercury in color - Prockter07-edit1.jpg

Mercury in enhanced color, imaged by MESSENGER (2008)
Designations
Pronunciation /ˈmɜːrkjəri/ (About this sound listen)
Adjectives Mercurian,[1]mercurial[2]
Orbital characteristics[5]
Epoch J2000
Aphelion
  • 0.466 697 AU
  • 69,816,900 km
Perihelion
  • 0.307 499 AU
  • 46,001,200 km
  • 0.387 098 AU
  • 57,909,050 km
Eccentricity 0.205 630[3]

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