Changes

== Physical characteristics ==

== Physical characteristics ==

Whitmire and Jackson have suggested that Nemesis would have a mass varying from 2 * 10^-4 to 7 * 10^-2 times the mass of the sun. This is the range of masses of brown or black dwarf stars. Muller has argued that the star is a somewhat hotter red dwarf, of magnitude between 7 and 12.<ref name=Muller/>

Whitmire and Jackson have suggested that Nemesis would have a mass varying from 2 * 10⁻⁴ to 7 * 10⁻² times the mass of the sun. This is the range of masses of brown or black dwarf stars. Muller has argued that the star is a somewhat hotter red dwarf, of magnitude between 7 and 12.<ref name=Muller/>

== Controversy ==

== Controversy ==

== Search for Nemesis ==

== Search for Nemesis ==

As mentioned, no one has yet seen Nemesis. A recent infrared survey of the sky failed to detect it.<ref name=Schlyter/> But at least two more wide-ranging surveys of the sky are planned, by the Panoramic Survey Telescope and Rapid Response System (Pan-Starrs)<ref name=PanStarrs>"[http://pan-starrs.ifa.hawaii.edu/public/ Pan-Starrs Home]."</ref> and the Large Synoptic Survey Telescope (LSST)<ref name=LSST>"[http://www.lsst.org/lsst_home.shtml LSST Home]."</ref><ref name=Muller/>

As mentioned, no one has yet seen Nemesis. A recent infrared survey of the sky failed to detect it.<ref name=Schlyter/> But at least two more wide-ranging surveys of the sky are planned, by the Panoramic Survey Telescope and Rapid Response System (Pan-Starrs)<ref name=PanStarrs>"[http://pan-starrs.ifa.hawaii.edu/public/ Pan-Starrs Home]."</ref> and the Large Synoptic Survey Telescope (LSST)<ref name=Muller/><ref name=LSST>"[http://www.lsst.org/lsst_home.shtml LSST Home]."</ref>

== References ==

== References ==