Earth, also known as the Earth or Terra, is the third planet outward from the Sun. It is the largest of the solar systems terrestrial planets, and the only planetary body that modern science confirms as harboring life. The planet formed around 4.5 billion (4.5×109) years... Earth has two massive sheets of ice called polar ice caps, one in the This is about the geographic meaning of North Pole. For the cities, see North Pole, Alaska and North Pole, New York. A North Pole is the northernmost point on any planet. There are various ways of defining a planets North Pole. Earths Pole, however it is defined, lies... north floating in the The Arctic Ocean, located mostly in the north polar region, is the smallest of the worlds five oceans, and the shallowest. Even though IHO recognizes it as an ocean, oceanographers may call it the Arctic Mediterranean Sea or simply the Arctic Sea, classifying it as one of the mediterranean... Arctic Ocean and the other in the The ceremonial South Pole. Flags of the Antarctic Treaty signatories are arrayed around it, and the Pole Stations old dome is in the background. The polar ice cap and the South Pole station on it are constantly moving relative to the actual, Geographic South Pole. The South Pole is... south approximately covering World map showing location of Antarctica A satellite composite image of Antarctica For the Kim Stanley Robinson novel see Antarctica (novel) Antarctica (from Greek ἀνταρκτικός, opposite the arctic) is a continent surrounding the Earths South Pole. It is the... Antarctica. The planet Mars is the fourth planet from the Sun in the solar system, named after the Roman god of war (the counterpart of the Greek Ares), on account of its blood red color as viewed in the night sky. This feature also earned it the name of Red Planet. Mars has... Mars also has ice caps, but they are believed to consist of frozen Carbon dioxide is an atmospheric gas composed of one carbon and two oxygen atoms. A very widely known chemical compound, it is frequently called by its formula CO2. Carbon dioxide results from the combustion of organic matter if sufficient amounts of oxygen are present. It is also produced by various... carbon dioxide as well as Drinking water This article focuses on water as we experience it every day. The water (molecule) article describes the water chemical and physical properties from a scientific and technical perspective. Water (from Low German or Old Saxon) is an abundant substance on Earth. It exists in many places and forms... water. Other A planet (from the Greek πλανήτης, planetes or wanderers) is a body of considerable mass that orbits a star and that produces very little or no energy through nuclear fusion. Prior to the 1990s only nine were known (all of them in our... planets and The common noun moon (not capitalized) is used to mean any natural satellite of the other planets. There are, at least, 140 moons within Earths solar system, and presumably many others orbiting the planets of other stars. Typically the larger gas giants have extensive systems of moons. Mercury and... moons may also have polar ice caps of water ice or other compounds.