000			01829 a2200253 4500
008			051207s xx 000 0 eng
022			_a1522-3264;
050			_aAC1.S5
082			_a050
100			_aJohnson, Rebecca,
245		0	_aChipping Away at a Mysterious Iceball. _cRebecca Johnson.
260			_bStar Date, _c2005.
440			_aSIRS Enduring Issues 2006. _nArticle 47, _pScience, _x1522-3264;
500			_aArticles Contained in SIRS Enduring Issues 2006.
500			_aOriginally Published: Chipping Away at a Mysterious Iceball, March/April 2005; pp. 4-9.
520			_a"By 1930, astronomers had been searching for 'Planet X,' a supposed planet beyond the orbit of Neptune, for a quarter of a century. That year, Clyde Tombaugh, a Kansas farmboy with no formal training in astronomy, picked out the motion of the remote planet from a backdrop of thousands of stars and galaxies on glass photographic plates. The new world appeared as nothing more than a tiny pinpoint of light. Astronomers could determine its orbit, but could learn little about its structure, composition or even its size. Today [2005], the planet named Pluto still appears as little more than a bright spot, even to the sharp eye of the Hubble Space Telescope. And it remains the only planet not visited by a spacecraft--an omission that may be remedied in the next decade." (STAR DATE) This article describes what scientists know about Pluto and discusses the New Horizons mission to Pluto that is set to arrive in 2015.
599			_aRecords created from non-MARC resource.
650			_aKuiper Belt
651			_aPluto (Planet) _xOrbits
651			_aPluto (Planet) _xSatellites
651			_aPluto (Planet)
710			_aProQuest Information and Learning Company _tSIRS Enduring Issues 2006, _pScience. _x1522-3264;
942			_c UKN
999			_c37795 _d37795