An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

Homepage  Preliminaries  Abbreviations  Acknowledgments  References 
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
Lockman hole
  سوراخ ِ لاکمن  
surâx-e Lockman
Fr.: trou de Lockman  

A region in the sky lying roughly between the → pointer stars
of the → Big Dipper that is almost free from → neutral hydrogen gas in the → Galaxy. It is centered at R.A. 10h 45m, Dec. +57° 20’, has
an area of 15 square degrees, and a → column density of NH I ≤ 5 x 1018 cm-2.
The Lockman hole is one of the favorite directions for obtaining a clear and unobstructed view of objects in deep space, far beyond our own Galaxy.

See also: Named after Felix J. Lockman et al., 1986, ApJ 302, 432; → hole.