Hierdie lêer kom vanaf Wikimedia Commons en kan ook in ander projekte gebruik word.
Die beskrywing op die lêer se inligtingsblad word hieronder weergegee.
Opsomming
BeskrywingEstrellatipos.png
Star types. Low-mass stars, less than half a solar mass, are fully convective from core to the surface and thus of uniform composition. This is because their low temperatures make their opacity to photons high. In intermediate-mass stars such as the sun, radiation transport works well enough in the core that convection does not take place; a stagnant core develops, surmounted by a convective region. These stars' surfaces do not include fusion products from the core, but retain the same composition as the cloud from which they formed. At 1.5 solar masses, the convective layer has almost disappeared and the star is essentially fully radiative. Above 1.5 solar masses, the CNO cycle contributes the majority of the energy production. Because this cycle is much more sensitive to temperature, the star's energy production is more tightly concentrated in the center, and this causes the development of a convective core.
Toestemming word verleen tot die kopiëring, verspreiding en/of wysiging van hierdie dokument onder die voorwaardes van die GNU-lisensie vir vrye dokumentasie, weergawe 1.2 of enige latere weergawe uitgegee deur die Stigting vir Vrye Sagteware, sonder Invariante Dele, geen Voorbladtekste en geen Agterbladtekste. 'n Kopie van hierdie lisensie is ingesluit in die afdeling getiteld GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
om te deel – die werk kopieer, versprei en deurgee
om te hermeng – om die werk aan te pas
Onder die volgende voorwaardes:
naamsvermelding – U moet die nodige krediet gee, 'n skakel na die lisensie verskaf en aandui of daar veranderinge aangebring is. U mag dit op enige redelike manier doen, maar nie op enige manier wat daarop dui dat die lisensiegewer u of u gebruik onderskryf nie.
insgelyks – As u die materiaal hermix, transformeer of voortbou, moet u u bydraes versprei onder die dieselfde of versoenbare lisensie as die oorspronklike.
This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue
Oorspronklike oplaailogboek
The original description page was here. All following user names refer to es.wikipedia.
2005-08-30 18:05 Xenoforme 572×284×8 (89304 bytes) Creación propia {{GFDL}}
Captions
Add a one-line explanation of what this file represents