The smallest and innermost planet of the solar system, closest to the Sun, with almost no atmosphere and the most extreme temperature swings of any planet, from over 400 degrees Celsius by day to well below freezing at night.
Facts
Diameter (km) Orbital Distance0.39 AU (about 58 million km) from the Sun 1 Sources
1. NASA Solar System Exploration
National Aeronautics and Space AdministrationEntity description, mercury-planet catalogue classificationQuote, Entity description, mercury-planet catalogue classification
The smallest and innermost planet of the solar system, closest to the Sun, with almost no atmosphere and the most extreme temperature swings of any planet, from over 400 degrees Celsius by day to well below freezing at night.
Wikipedia: Mercury (planet)
In Group: Terrestrial Planets, Lead sentenceQuote, In Group: Terrestrial Planets, Lead sentence
Mercury is the first planet from the Sun and the smallest in the Solar System.
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