Difference between revisions 3795391 and 4478171 on simplewiki

< previous diff
User:AJona1992/Solar System
[[File:Planets2008.jpg|400px|thumb|right|The [[Sun]], [[planet]]s and [[dwarf planet]]s of the Solar System. Compared with each other, the sizes are correct but the distances are not.]]
(contracted; show full)ass through without any damage. Asteroids with diameters between 10 and 10<sup>−4</sup>&nbsp;m are called [[meteoroid]]s.<ref>{{cite journal |author=Beech, M. |coauthors=Duncan I. Steel |year=1995 |month=September |title=On the Definition of the Term Meteoroid |journal=[[Quarterly Journal of the Royal Astronomical Society]] |volume=36 |issue=3 |pages=281–284 |bibcode=1995QJRAS..36..281B |last2=Steel}}</ref>

====Ceres====
[[Ceres (dwarf planet)|Ceres]] (2.77&nbsp;AU) is the 
largest asteroid, a [[protoplanet]], and a dwarf planet. Itonly dwarf planet in the inner Solar System and the largest asteroid. It is probably a surviving [[protoplanet]] (planetary embryo) that formed 4.57 billion years ago in the asteroid belt. Ceres has a diameter of under 1000&nbsp;km, and a mass large enough for its own gravity to pull it into a [[sphere|spherical shape]]. Ceres was considered a planet when it was discovered in the 19th century, but was reclassified as an asteroid in the 1850s as further observations revealed additional asteroids.<ref>{{cite web |title=History and Discovery of Asteroids |format=DOC |work=NASA |url=http://dawn.jpl.nasa.gov/DawnClassrooms/1_hist_dawn/history_discovery/Development/a_modeling_scale.doc |access(contracted; show full)p://www.boulder.swri.edu/~bottke/Reprints/Morbidelli-etal_2002_AstIII_NEOs.pdf|title = Origin and Evolution of Near-Earth Objects|author = A. Morbidelli, W. F. Bottke Jr., Ch. Froeschlé, P. Michel|journal = Asteroids III|editor = W. F. Bottke Jr., A. Cellino, P. Paolicchi, and R. P. Binzel|pages = 409–422|month = January | year = 2002|publisher = University of Arizona Press|format=PDF|bibcode = 2002aste.conf..409M|last2 = Bottke|last3 = Froeschlé|last4 = Michel}}</ref>

== References ==
{{reflist|2}}