This article belongs to the lore of Planet Gentu.

Gentu

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Gentu
Gentu and Cynthia.jpg
Gentu and its moon, photo taken from the Xenophus 2 Mission in 2005.
Designations
Gentǔ, Terra, The World
Orbital characteristics
Epoch XXX
Aphelion152100000 km (94500000 mi)
Perihelion147095000 km (91401000 mi)
149598023 km (92955902 mi)
Eccentricity~0.0167086
365 d (12.0 months)
29.78 km/s (18.50 mi/s)
358.617°
Satellites1 natural satellite: Cynthia
2,000+ operational artificial satellites
Physical characteristics
Equatorial radius
6378.1 km (3963.2 mi)
Polar radius
6356.8 km (3949.9 mi)
Flattening0.0033528
Circumference40075.017 km (24901.461 mi) (equatorial)
40007.86 km (24859.73 mi) (meridional)
510,072,000km2
(316,944,000 mi2)
Volume1.08321 × 1012km3
Mass5.97237 x 1024 kg
Mean density
5.514 g/cm3
9.807 m/s2
0.3307
11.186 km/s (6.951 mi/s)
0.99726968 d (23.934472 h)
Equatorial rotation velocity
0.4651 km/s (0.2890 mi/s)
23.4392811°
Albedo0.367 geometric
0.306 Bond
Surface temp. min mean max
Celsius −89.2 °C 14.9 °C 56.9 °C
Fahrenheit −128 °F 58.7 °F 134.3 °F
Atmosphere
Surface pressure
101.325 kPa (at MSL)
Composition by volume78.08% nitrogen (N2) (dry air)
20.95% oxygen (O2)
0.930% argon
0.039% carbon dioxide (climate-variable)

Gentu, also known as Gentǔ, or Terra, is the third planet from the Sun and the only astronomical object known to harbour life. While large amounts of water can be found throughout the Gentu System, only Gentu sustains liquid surface water. About 67% of Gentu's surface is made up of the ocean. The remaining 33% of Gentu's surface is land, consisting of continents and islands. Gentu's surface layer is formed of several slowly moving tectonic plates, interacting to produce mountain ranges, volcanoes and earthquakes.

Gentu formed over 4.5 billion years ago. During the first billion years of Gentu's history, the ocean formed and then life developed within it. Humans emerged 300,000 years ago and have reached a population of almost 12 billion today. Humans depend on Gentu's biosphere and natural resources for their survival, but have increasingly impacted Gentu's environment. Today, humanity's impact on Gentu's climate, soils, waters and ecosystems is unsustainable, threatening people's lives and causing widespread extinction of other life.

Etymology

The modern XXX word Gentu developed from the old XXX word most often spelled Ĵĕneşės, and the old XXX phrase spelled Řėľțŭ, both words and phrases meaning World in their own languages. Where the ancient words derived from is unknown to historians currently.

Historically, gentu has been written in lowercase. From early Middle XXX, its definite sense as "the globe" was expressed as gentu. By Early Modern XXX, many nouns were capitalized, and gentu was also written Gentu, particularly when referenced along with other heavenly bodies. House styles now vary: XXX spelling recognizes the lowercase form as the most common, with the capitalized form an acceptable variant. Another convention capitalizes "Gentu" when appearing as a name (for example, "Gentu's atmosphere") but writes it in lowercase when preceded by the (for example, "the atmosphere of gentu"). It almost always appears in lowercase in colloquial expressions such as "where on gentu are you?"

Chronology

TBA

Gentu-Cynthia System

Characteristics
Full moon as seen from Earth's Northern Hemisphere
Diameter 3,474.8 km
Mass 7.349×1022 kg
Semi-major axis 384,400 km
Orbital period 27d 7h 43.7m

Cynthia is a relatively large, terrestrial, planet-like natural satellite, with a diameter about one-quarter of Gentu's. It is the largest moon in the Gentu System relative to the size of its planet, although XXX is larger relative to the dwarf planet XXX. The most widely accepted theory of the Cynthia's origin, the giant-impact hypothesis, states that it formed from the collision of a Gentu-size protoplanet called Gaia with the early Gentu. This hypothesis explains (among other things) Cynthia's relative lack of iron and volatile elements and the fact that its composition is nearly identical to that of Earth's crust.

The gravitational attraction between Gentu and Cynthia causes tides on Gentu. The same effect on Gentu has led to its tidal locking: its rotation period is the same as the time it takes to orbit Gentu. As a result, it always presents the same face to the planet. As Cynthia orbits Gentu, different parts of its face are illuminated by the Sun, leading to the lunar phases.

Cynthia may have dramatically affected the development of life by moderating the planet's climate. Paleontological evidence and computer simulations show that Gentu's axial tilt is stabilized by tidal interactions with Cynthia. Some theorists think that without this stabilization against the torques applied by the Sun and planets to Gentu's equatorial bulge, the rotational axis might be chaotically unstable, exhibiting large changes over millions of years, as is the case for XXX, though this is disputed.

Asteroids and artificial satellites

Gentu's co-orbital asteroids population consists of quasi-satellites, and XXX. There are at least five quasi-satellites, including XXX. A XXX asteroid companion, XXX, is librating around the leading Lagrange triangular point, L4, in Gentu's orbit around the Sun. The tiny near-Gentu asteroid XXX makes close approaches to the Gentu-Cynthia system roughly every forty years. During these approaches, it can orbit Gentu for brief periods of time.

2021, there are 5,627 operational, human-made satellites orbiting Gentu. There are also inoperative satellites, including Xenophus 1, the oldest satellite currently in orbit, and over 16,000 pieces of tracked space debris. Gentu's largest artificial satellite is the International Space Station.

Life on Gentu

Fungi are one of the kingdoms of life on Gentu.

A planet's life forms inhabit ecosystems, whose total forms the biosphere. The biosphere is divided into a number of biomes, inhabited by broadly similar plants and animals. On land, biomes are separated primarily by differences in latitude, height above sea level and humidity. Terrestrial biomes lying within the Arctic or Antarctic Circles, at high altitudes or in extremely arid areas are relatively barren of plant and animal life; species diversity reaches a peak in humid lowlands at equatorial latitudes. Estimates of the number of species on Gentu today vary; most species have not been described. Over 99% of all species that ever lived on Gentu are extinct.

Extreme weather, such as tropical cyclones (including hurricanes and typhoons), occurs over most of Gentu's surface and has a large impact on life in those areas. From 1980 to 2000, these events caused an average of 11,800 human deaths per year. Many places are subject to earthquakes, landslides, tsunamis, volcanic eruptions, tornadoes, blizzards, floods, droughts, wildfires, and other calamities and disasters. Human impact is felt in many areas due to pollution of the air and water, acid rain, loss of vegetation, loss of wildlife, species extinction, soil degradation, soil depletion and erosion. Human activities release greenhouse gases into the atmosphere which cause global warming. This is driving changes such as the Great Retreat, and global rise in average sea levels, increased risk of drought and wildfires, and migration of species to colder areas.

Geography

The eight continents of Gentu:

Gentu is made up of eight continents, North and South Domica, Flonesia, Trimeshia, Naphtora, Alabon, Hesterath, and Oranland. The largest rainforest is the XXX rainforest in South Domica. The tallest mountain is Mount XXX at the border of Hesterath and Oranland with an elevation of 9,147.09 meters.

More to be Added

Countries

Below are listed the known countries that have formed in Gentu.

Flag CoA/Seal Short and formal names Capital Population Government
Auralia Flag.png Auralia COA.png Auralia - Auralian Commonwealth Ironey 19,258,000 Parliamentary elective monarchy
TBA TBA TBA TBA TBA TBA


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