What are Rogue Planets? – Closest Rogue Planet to Earth – Space Engine Quick Tour – Beauty Above Us

What are Rogue Planets? – Closest Rogue Planet to Earth – Space Engine Quick Tour – Beauty Above Us


An object, with a mass that falls within the
range of the definition of a planet, orbits the center of the galaxy directly is known
as rogue planet. It is called by different names like interstellar
planet, nomad planet, free-floating planet, orphan planet, wandering planet, starless
planet, sunless planet, or Planemo. Such objects have either been ejected from
the planetary system in which they formed, or have never been gravitationally bound to
any star or brown dwarf. The Milky Way alone may have billions of rogue
planets. Some planetary-mass objects are thought to
have formed in a similar way to stars, and the The International Astronomical Union has
proposed that those objects be called sub-brown dwarfs. A possible example is Cha 110913-773444, which
might have been ejected and become a rogue planet, or otherwise formed on its own to
become a sub-brown dwarf. The closest free-floating planetary-mass object
to Earth yet discovered, WISE 0855-0714, is at 7 light years, though it may be a sub-brown
dwarf. This table shows known rogue planets that
are confirmed or suspected. It is yet unknown whether these planets were
ejected from orbiting a star, or else formed on their own as sub-brown dwarfs.

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