Vivvo CMS 4.1 http://www.extrasolar-planets.com/ ©2007 Spoonlabs d.o.o. http://www.extrasolar-planets.com/files.php?file= http://www.extrasolar-planets.com/ http://www.extrasolar-planets.com/astronomy/brown_dwarfs.html Astronomy Sat, 21 Mar 2009 23:54:00 +0000 Brown dwarfs are the link between stars and planets and are not massive enough like stars on the main sequence and sometimes called as failed stars. As a result of their mass-poor they don't start the hydrogen fusion. But brown dwarfs heavier than 13 Jupiter masses do fuse deuterium. extrasolar-planets.com