Astronomy Answers
From the Astronomical Dictionary


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The description of the word you requested from the astronomical dictionary is given below.

Mercury

'Mer‧cu‧ry; Mercurius = [Latin] the messenger of the gods

  1. In astronomy, Mercury is the first planet of our Solar System, counting from the Sun. Mercury is a terrestrial planet without moons, rings, or an atmosphere. Mercury has a diameter of 4880 km and is number 11 on the list of largest objects in our Solar System.
  2. On Earth, mercury is a metal that is liquid at room temperature.