Scientists believe that before the discovery of Millenia, the planet was once similar to Earth.  It was once continental as Earth was.  During that time, the weather was also similar to that of the Earth.  But when the polar icecaps melted, due to greenhouse effect, temperature rose by approximately 8 degree celsius, causing the sea level to rise by 1,000 ft., covering most of the continents and leaving the once highest peak of the Planet Millenia surfacing the ocean. Millenia is a planet that is similar to Earth, with 5% land and 95% water. It does not have continents like we do. It is composed of three tropical islands close to each other around the equator of the planet.

Millenia has 5 inner layers. The crust, the lithosphere and asthenosphere, mantle, the outer core and the inner core are the five layers of Millenia, which are similar to those layers of the Earth. The surface rocks are made mostly of the chemical elements oxygen and silicon, along with some metals. Beneath this is a thick layer of hearview rock called the mantle, which encloses the inner and outer cores. The solid metal inner core is the densest part of the planet. The liquid outer core is continually moving, causing a constantly changing magnetic field to envelop the planet.

Outer Layers

When Millenia was first formed, the original elements in the atmosphere were products from the dissolved gases in the magma under the planet's crust. These gases were released through the crust in the form of volcanic eruptions. After many years of oxygen released from the photo synthetic organisms, the level of oxygen built up in the atmosphere. The atmosphere is similar to that of the Earth, but mainly contains 75% nitrogen, 20% oxygen, 3% of hydrogen and other gases. It is divided into layers similar to Earth's atmospere: exosphere and magnetosphere, thermosphere, mesosphere, stratosphere and troposphere. The highest layer exosphere merges with the outerspace. The stratosphere contains the ozone gas, which can block harmful ultraviolet rays from the sun and protect the creatures on the planet. But interestingly enough, the ozone layer of Millenia is slowly being deplete just like Earth. The lowest layer, troposphere, is where the weather takes place.

Millenia also has different kinds of rocks just as Earth does. 1) Igneous rocks were the ones that appeared first. As volcanoes erupt molten magma, which cools and becomes solid, some magma will cool as igneous rock underground. 2) Sedimentary rocks are formed from material that previously made other rocks. Over time, the layers are buried and squashed to become lithified, or hardened, into new rocks. 3) Metamorphic rocks are made from preexisting rocks, by forms of recrystallization or texture changes. This usually happens deep inside the planet's crust, where it is hot enough and there is enough pressure from the overlying rocks to make rocks recrystallize without melting.

The water cycle on Millenia circulates the same way as that of the Earth. Water from the ocean evaporates by the heat of the sun. The water vapor collects in the air forming clouds that blows. The cool air inland causes the clouds to liquefy or solidify and falls back to the ground in the form of rain completing the cycle.

This is the mountain range on the northern island on Millenia. It was once the peak of a biggest canyon in this solar system. Before the icecaps had melted, it reached an altitude of about 5,000 meters.