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Welcome to the Space Wiki! About this wiki | New pages | Popular pages | Categories | Wiki tutorial | Help pages. Featured Article. Planetary Resources is a venture that has the long term goal to become the first asteroid mining company. Film director James Cameron (Left), the creator of Avatar, has just become one of their investors.
Space is a three-dimensional continuum containing positions and directions. [1] In classical physics, physical space is often conceived in three linear dimensions. Modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime. [2]
Being essentially empty, outer space allows the earliest (redder) galaxies to be viewed without obstruction, as in the Webb's First Deep Field image. Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies.
A planet is a general term given to a relatively large mass of accreted matter in orbit around a star. A mass that becomes massive enough for nuclear reactions to start is considered a star, instead of a planet.
Space exploration is the use of astronomy and space technology to explore outer space. While the exploration of space is currently carried out mainly by astronomers with telescopes, its physical exploration is conducted both by uncrewed robotic space probes and human spaceflight.
Outer space, or simply space, is the void that exists between celestial bodies, including the Earth. It is not completely empty, but consists of a hard vacuum containing a low density of particles: predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, and neutrinos.
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Outer space, commonly shortened to space, is the near-vacuum between celestial bodies. It is where all of the planets, stars, galaxies and objects are found. It is the expanse that exists beyond Earth and its atmosphere. On Earth, space begins at the Kármán line (100 km above sea level).
