An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


Notice: Undefined offset: 8 in /var/www/dictionary/searchDisplayPaging.php on line 18
<< < act cou ene hig mas red sup yel > >>

Number of Results: 142 Search : erg
yellow supergiant (YSG)
  اَبَر-غول ِ زرد   
abarqul-e zard (#)

Fr.: supergéante jaune   

A supergiant star of type F and G whose effective temperature is between 4800 and 7500 K. Yellow supergiants are extremely rare, because they represent a very short-lived phase, typically a few tens of thousands of year, in the evolution of → massive stars.

yellow; → supergiant.

zero point energy
  کاروژ ِ نقطه‌ی ِ صفر   
kâruž-e noqte-ye sefr

Fr.: énergie du point zéro, point zéro   

The lowest possible energy that a → quantum mechanical system may possess. It is the energy of the → ground state of the system. The term "zero point" refers to the observed fact that → vacuum fluctuations persist at → absolute zero temperature. Same as → vacuum energy.

zero; → point; → energy.


Notice: Undefined offset: 8 in /var/www/dictionary/searchDisplayPaging.php on line 18
<< < act cou ene hig mas red sup yel > >>