Astroffiseg: Gwahaniaeth rhwng fersiynau

'''Astroffiseg''' yw'r gangen o [[seryddiaeth]] sy'n delio â [[ffiseg]] a [[Cemeg|chemeg]] y [[bydysawd]] h.y. gwneuthuriad ffisegol y planedau, y sêr a gwrthrychau eraill yn hytrach na'u lleoliad neu symudiad drwy'r gofod. Mae hyn yn cynnwys priodweddau megis [[dwysedd]], [[tymheredd]], [[cyfansoddion cemegol]] a goleuedd o wrthrychau wybrennol e.e. [[galaeth|galaethau]], [[seren|sêr]], [[planed|planedau]], [[Planed allheulol|planedau allheulol]], a'r [[cyfrwng rhyngserol]], yn ogystal a'i rhyngweithiadau.<ref>{{Citation | last = Keeler | first = James E. | author-link = James E. Keeler | title = ''The Importance of Astrophysical Research and the Relation of Astrophysics to the Other Physical Sciences'' | journal = The Astrophysical Journal | volume = 6 | issue = 4 | pages = 271–288 | date = Tachwedd 1897 | bibcode = 1897ApJ.....6..271K |doi = 10.1086/140401| quote =[''Astrophysics] is closely allied on the one hand to astronomy, of which it may properly be classed as a branch, and on the other hand to chemistry and physics.… It seeks to ascertain the nature of the heavenly bodies, rather than their positions or motions in space–''what'' they are, rather than ''where'' they are.… That which is perhaps most characteristic of astrophysics is the special prominence which it gives to the study of radiation.''}}</ref><ref>{{cite web | title=astrophysics | publisher=Merriam-Webster, Incorporated | url=http://www.merriam-webster.com/dictionary/astrophysics | accessdate=2011-05-22 | archiveurl= https://web.archive.org/web/20110610085146/http://www.merriam-webster.com/dictionary/astrophysics| archivedate= 10 Mehefin 2011 <!--DASHBot-->| deadurl= no}}</ref>

 

 

Astudir [[pelydriad]] (''radiation'') y gwrthrychau hyn; gwneir hynny ar draws y sbectrwm [[elecromagneteg|elecromagnetig]], gyda nifer o briodweddau gan gynnwys disgleirdeb (''luminosity''), dwysedd, [[tymheredd]] a chyfansoddiadau cemegol. Gan fod astroffiseg yn faes mor eang astudir ystod eang o feysydd gan gynnwys [[mecaneg]], [[electromagneteg]], [[mecaneg ystadegol]], [[thermodeinameg]], [[mecaneg cwantwm]], [[Damcaniaeth perthnasedd]], [[ffiseg niwclear]] a [[ffiseg gronynnau|gronynnol]] a [[ffiseg atomig, moleciwlar ac optegol]].