Coastal & Marine Geology InfoBank

Home FACS Activities Atlas Geology School Related Sites More

USGS CMG InfoBank: Forming the Solar System

Skip navigational links
Loading
Dictionaries: Our Mapping Systems   The USGS and Science Education   USGS Fact Sheets   Topics   Keywords   Data Dictionary   Metadata Dictionary   Computer Terminology   Digital Formats  
InfoBank Terms: Activity ID   activity overview   crew   digital data   formal metadata   lines   metadata   NGDC   port stops   project/theme   region   ship   stations   time   virtual globe   year  
Data Types: bathymetry   biological   geochemical   gravity   ground penetrating radar   imaging   LIDAR   logs   magnetics   metering equipment   navigation   samples   seismic   total station   definitions disclaimer  
Data Formats: ARC coverage   E00   FGDC metadata   gridded/image   imaging   material   scattered/swath   Shapefile   vector/polygon  
Comment: 05:04 - 05:53 (00:49)
Source: Annenberg/CPB Resources - Earth Revealed - 2. The Restless Planet
Keywords: "formation of the Sun", "planetary accretion", planet

Our transcription: Gradually, the gas and star dust become more and more concentrated at the center of the nebula, heating up to form a star.
The material spinning around a new star flattens into a disc, drawn there by gravity from the equatorial bulge created by the star's rotation.
Over tens of millions of years, dust gathers as clumps in the hot disk.
These collide and weld together under the influence of gravity, forming larger objects called "planetesimals", which, in turn, come together to form the planets.
The precise details of this accretionary process remain unclear.
Ultimately, the gases themselves partially crystallize and condense to form balls of ice.

Geology School Keywords
Skip footer navigational links

Coastal and Marine Science Centers:  Pacific   St. Petersburg   Woods Hole  
InfoBank   Coastal and Marine Geology Program   Geologic Information   Ask-A-Geologist   USGS Disclaimer  


Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/02.01.11.html
Page Contact Information: InfoBank staff
Page Last Modified: Thu Oct 31 04:25:10 PDT 2013  (chd)