Fusor (astronomy)

Fusor (astronomy)

A fusor is a term proposed to the IAU by Gibor Basri, Professor of Astronomy at the University of California, Berkeley, to help clarify the nomenclature of celestial bodies. Under his definition a fusor would be "an object that achieves core fusion during its lifetime."cite journal| url=http://astron.berkeley.edu/%7Ebasri/defineplanet/Mercury.htm| month= Nov/Dec| year= 2003| journal=Mercury| title=Defining "Planet"| first=Gibor| last= Basri] This definition included any form of nuclear fusion so the lowest possible mass of a fusor was set at roughly 13 times that of Jupiter, at which point deuterium fusion becomes possible. This is significantly smaller than the point at which sustained fusion of hydrogen becomes possible, around 60 times the mass of Jupiter. Objects aren't considered "stellar" until around 75 times the mass of Jupiter, when contraction of the object due to gravity is halted by heat generated by the internal nuclear reaction.

It is unknown whether Basri took the name from the Farnsworth apparatus.


ee also

* Planemo

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Fusor (disambiguation) — Fusor may refer to:* Fusor or the Farnsworth–Hirsch Fusor, an apparatus designed by Philo T. Farnsworth to create nuclear fusion * Fusor (astronomy), an object that achieves core fusion during its lifetime * Fuzor (Transformers), a type of… …   Wikipedia

  • Outline of astronomy — Mauna Kea in Hawaii is one of the world s premier observatory sites. Pictured is the W. M. Keck Observatory, an optical interferometer. The following outline is provided as an overview of and topical guide to astronomy: Astronomy – studies the… …   Wikipedia

  • Planetar (astronomy) — Planetar is a term used in astronomy that refers to one of two things: * Brown dwarfs objects intermediate in size between planets and stars. * Interstellar planets planetars that are cold masses smaller than brown dwarfs and do not orbit a star …   Wikipedia

  • Planemo — A planemo is a celestial object with mass greater than that of an irregularly shaped asteroid, yet smaller than a nuclear reactive brown dwarf or star. This bizarre class of planet sized objects has no suns at all, and instead floats untethered… …   Wikipedia

  • IAU definition of planet — This article is about the formal definition established in 2006. For prior usage, see Definition of planet. The definition of planet set in 2006 by the International Astronomical Union (IAU) states that, in the Solar System, a planet is a… …   Wikipedia

  • Mesoplanet — is a term coined by Isaac Asimov to refer to planetary bodies with sizes smaller than Mercury but larger than Ceres. Assuming size is defined by linear dimension (or by volume), mesoplanets should be approximately 1,000 km to 5,000 km… …   Wikipedia

  • Star — For other uses, see Star (disambiguation) …   Wikipedia

  • Supernova — This article is about the astronomical event. For other uses, see Supernova (disambiguation). Multiwavelength X ray, infrared, and optical compilation image of Kepler s supernova remnant, SN 1604. A supernova is a stellar explosion that is more… …   Wikipedia

  • White dwarf — For other uses, see White dwarf (disambiguation). Image of Sirius A and Sirius B taken by the Hubble Space Telescope. Sirius B, which is a white dwarf, can be seen as a faint pinprick of light to the lower left of the much brighter Sirius A …   Wikipedia

  • Stellar classification — In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.