Centa'lachon

Centa'lachon is located in an entirely different universe. That universe is relatively similar to ours, with similar laws of physics (if it were too different from our universe the Centens could not survive travelling to our universe). It's not entirely the same, though. There's some additional things going on there, like natural hyverium and hyverianites, and a few other exotic particles that don't naturally occur here. The planet is relatively similar to Earth, having massive oceans of water and countless different biomes, but it looks a lot like Earth from space: a large ball of blue and green, for the most part. The 'plants' that create this green colour are different from our trees and grasses, though. There's also a slight shimmer to the sky there, like you're looking through a bubble of soap. And the abundance of hyverium and hyverianites creates some really strange sights.

Much of the wildlife has hyverium cells, creating new forms of hunting (luring their prey into a trap with telepathic signals, for example), and there's some floating rocks thanks to lithoverium.

The Centensian homeworld, Centa'lachon, is a planet not too dissimilar to Earth. It has a few continents with large oceans of water, and it's covered in plant life that's usually green in colour (though they have more exotically coloured planets too). The plants themselves look quite different, and there's several types of unusual lifeforms on the planet - more domains and kingdoms than you'd find here on Earth. From outer space, the planet looks very much like Earth, however, with blue oceans and mostly green continents, though a fair portion of the surface is also covered in urban areas.

Nature
The average temperature is mild but the climate is varied, and due to the planet's size the gravity is a bit greater than on Earth. The Centens preferred planets that resembled their homeworld, so Earth-like planets would be comfortable to them, but they adapted to life on many different kinds of worlds and some Centens preferred harsher planets.

The climate on that planet is generally a bit warmer than here on Earth, but not by much. As a result, the polar ice caps are slightly smaller too, but they definitely exist.

The native fauna and flora of their homeplanet contains hyverium - there's even other animals, plants and such that developed similar hyverium-powered abilities - and even the atmosphere there contains some hyverium.

The same goes for many other inhabited planets in their native universe.

It's experienced countless of natural disasters, too. Asteroid impacts, earthquakes, volcanoes, hurricanes - Centa'lachon has seem them all. Like Earth, it went through many mass extinctions as well, though the Centens have stabilized the planet somewhat: they don't want to stop it from evolving, but they interfere whenever a major event threatens the planet.

Cities
Centa'lachon is definitely home to massive cities, but the Centens have been able to keep it from getting overpopulated. At some point in their early history they did run into pollution issues much like we do, but they solved those issues eons ago and have made Centa'lachon a sanctuary with a strictly limited population since.

It's almost fully inhabited. There's still quite a bit of nature to be found there, since Centens prefer building high over building wide, so it's not like Coruscant or anything, but it's certainly a lot more densely populated than Earth or Elithia.

Vas Andra'veih is the capital city of the Centens, located on their homeplanet. It's accompanied by Vhalas Andra'veih, the capital palace. The Andra'veihan Heart is named after this capital, as that's where the Hearts were originally created.

Trivia

 * The Centensian home universe can be accessed through hyperdrive-like devices, but attuned to different frequencies. There's countless such parallel universes which can be accessed through such devices, but exploring them is extremely dangerous. Many have laws of physics so different from our own that anything that enters them is ripped apart instantly, leaving nothing but pure energy (the one constant throughout all universes).
 * The Centens have mapped and explored countless of these universes, but the Alliance has found barely any that can sustain physical objects like ours does. The Centensian home universe hasn't been found yet, either.
 * It was called Centagalaxon at some point.
 * It's unlikely the sight of the planet would drive someone insane, but the wildlife there certainly could... Even some of the plant-like lifeforms use hyverium-enabled telepathy, and one with a feeble mind could definetly go insane from constant barrage of signals.
 * The atmosphere is a bit different, but still breathable. The temperature is similar to that of Earth, too. It'd be uncomfortable for humans.
 * There's strange magnetic and electrical fields all over the place, too. Those too can mess with both people and devices.