| − | The dwarf [[planet]] '''Pluto''', named for the [[Roman]] [[god]] of the [[Underworld]], was discovered in 1930 by [[American]] [[astronomy|astronomer]] [[Clyde Tombaugh]]. In 2006, the [[International Astronomers Union]] demoted Pluto from the status of a planet to that of a dwarf planet. Recently there have been efforts to restore Pluto's status as a planet.<ref>http://www.courant.com/features/lifestyle/hc-pluto.artmar15,0,4959275.story?coll=hc-headlines-life</ref> Pluto has at least three [[moon]]s, the largest of which is [[Charon]]. It is believed by scientists that Pluto's second moon is hollow. | + | The dwarf [[planet]] '''Pluto''', named for the [[Roman]] [[god]] of the [[Underworld]], was discovered in 1930 by [[American]] [[astronomy|astronomer]] [[Clyde Tombaugh]]. In 2006, the [[International Astronomers Union]] demoted Pluto from the status of a planet to that of a dwarf planet. Recently there have been efforts to restore Pluto's status as a planet.<ref>http://www.courant.com/features/lifestyle/hc-pluto.artmar15,0,4959275.story?coll=hc-headlines-life</ref> Pluto has at least three [[moon]]s, the largest of which is [[Charon]]. |
| | Pluto is the second-largest known [[dwarf planet]] in the solar system and the tenth largest observed body directly orbiting the [[Sun]].{{fact}} | | Pluto is the second-largest known [[dwarf planet]] in the solar system and the tenth largest observed body directly orbiting the [[Sun]].{{fact}} |