Changes

==Star System==

==Star System==

Regulus is really a multiple star system made up of four known stars grouped in two binary pairs.  Of the four, only three can be visibly observable.  Only the blue-white Regulus A is visible with the unaided eye, and is closely orbited by what is most likely a [[white dwarf]].  The other two companion stars of the Regulus system are cooler, main sequence stars some 4200 AU away from Regulus A. The system was originally thought to be around 300 million years old, however recent data suggests the age of the system may be only around 50 million years.<ref name="McAlister">http://xxx.lanl.gov/abs/astro-ph/0501261</ref>

Regulus is really a multiple star system made up of four known stars grouped in two binary pairs.  Of the four, only three can be visibly observable.  Only the blue-white Regulus A is visible with the unaided eye, and is closely orbited by what is most likely a [[white dwarf]].  The other two companion stars of the Regulus system are cooler, main sequence stars some 4200 AU away from Regulus A.  

===Alpha Leonis A===

===Alpha Leonis A===