Mercury

Mercury is a planet in the Sol system. It is known for being the closest planet to the Sun.
== History ==
Mercury was formed along with the other planets in the system approximately 4.5 billion years ago.
While military factions from Earth in the 21st century spread out into the cosmos, they colonized many planets in the Sol system. Mercury was likely one of them.
== Physical Characteristics ==
Mercury's climate constantly shifts between burning heat in the day and bitter cold during the night. There is no atmosphere to keep heat in or out, so it loses most of it on the side facing away from the Sun. Its surface is incredibly barren, with no native life and no ecosystems to speak of. It is covered in craters from asteroid impacts and its surface is similar to that of Earth's moon, Luna. All of this is due to Mercury's size, as its volume is only 5.6% of Earth's.
A Mercurian year is the shortest of all of Sol's planets, circling the Sun in 88 Earth days. It completes one full rotation on its axis in 59 days. It has no natural satellites. Despite its small size, it has a stable and surprisingly strong magnetic field for such a tiny planet. This is due to its very large and iron-rich core, which comprises roughly 55% of its internal volume.
== Inhabitants ==
Mercury has no permanent residents, being too hot and barren to support life.
Category:Planets
Category:Planets in Solar System