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Earth

From Halopedia, the Halo wiki

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Earth
Earth thumbnail from Dr. Catherine Halsey's Computer and Halo: Warfleet – An Illustrated Guide to the Spacecraft of Halo. The image is based on the Blue Marble photo.
Astrographical

System:

Sol system

Orbiting:

Sol[1]

Orbital position:

Third planet[1]

Moon(s):

One; Luna[1]

Physical

Diameter:

12,756 kilometers (7,926 mi)[1]

Gravity:

1.0 G[1]

Length of day:

24 hours[1]

Length of year:

365.2 days[1]

Atmosphere:

1.0 (N2, O2, Ar)[1]

Surface temperature:

-20°C to 40°C (-4°F to 104°F)[1]

Societal

Demonym:

Earther[2]

Species:

Population:

  • Approx. 10 billion (pre-Battle of Earth)[3][4]
  • Approx. 200 million (Post-Battle of Earth, as of Nov. 17, 2552)[5][6]
  • 7.9 billion (modern)[7]

Government:

UNSC strategic significance:

Critical (2558)[9]

UNSC threat level:

Alpha (2558)[9]

 

"Beautiful, isn't she?"
— Thomas Lasky discussing Earth, with John-117.[10]

Earth is the third planet and one of four terrestrial worlds of the Sol system. It is the presumptive homeworld of the human species, though this was disputed by some ancient humans, due to the loss of records to technological dark ages and the presence of human ruins on other worlds.[11] It is the current capital world of the Unified Earth Government, and home to the headquarters of the United Nations Space Command.

With a population of around ten billion, Earth was the most populated planet in UEG territory prior to the Covenant invasion. Despite being dramatically reduced during the Covenant invasion in 2552 due to both casualties inflicted by the Covenant and a major evacuation effort, the population had again risen to several billion by the end of 2553.[4]

Overview

Nomenclature

Earth is also known by the designation of Sol III.[5][12] During the Forerunner era it was called Erde-Tyrene[13] (pronounced "Er-da-ty-reen")[14] which was abreviated to "Erda".[11][15] The name Erde-Tyrene would be known to the Prophet of Regret and his forces after the planet's discovery at a Meridian Forerunner artifact.[16]

Astronomical features

Earth experiences the aurora borealis.[17]

Orbital locations

Environmental features

Planetside, Earth has seven continents. Three continents are