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

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 6 Search : deep
deep
  ۱) ژرف، گود؛ ۲) ژرفنا   
1) žarf (#), gowd (#); 2) žarfnâ (#)

Fr.: 1) profond; 2) profondeur   

1a) General: Extending well inward from an outer surface or back from an edge.
1b) Great in measure; intense. → deep exposure.
1c) Of colors, dark and vivid.
2) The deep part of a body of water, especially an area of the ocean floor having a depth greater than 5400 meters (Dictionary.com).

O.E. deop, from P.Gmc. *deupaz, from PIE *d(e)u- "deep, hollow."

Žarf "deep;" variants Gilaki jalf, julf, jal; Tabari jol, jal, jul; Baluci jahl, johl; Kermâni jarr "deep;" Mid.Pers. zufr; Av. jafra- "deep."
Gowd, probably ultimately from PIE root *gwādh- "to sink, submerge;" cf. Av. vigāθô- "ravines, gorges;" Skt. gādha- "depth; shallow;" Gk. bessa "gorge, ravine."

deep exposure
  نورداد ِ ژرف   
nurdâd-ežarf

Fr.: pose profonde   

An exposure in which the detector shutter remains open for a relatively long time in order to bring out the weaker features of the observed object. In practice a deep exposure with a CCD detector is usually obtained from co-addition of shorter exposures.

deep; → exposure.

deep field
  میدان ِ ژرف   
meydân-e žarf

Fr.: champ profond   

An area on the sky whose image is obtained with a deep exposure, such as → Hubble Deep Field.

deep; → field.

deep image
  تصویر ِ ژرف   
tasvir-e žarf

Fr.: image profonde   

An image obtained using a deep exposure to reveal the weak features of the object.

deep; → image.

deep time
  زمان ِ ژرف   
zamân-e žarf

Fr.: temps profond   

The time-scale of geologic processes which is millions or billions of years in contrast to the few thousand years claimed by supporters of the → creationism. The concept of "deep time" was first described in 1788 by the Scottish geologist James Hutton (1726-1797) in the Transactions of the Royal Society of Edinburgh. The term was coined by the American author John McPhee (1931-).

deep; → time.

Hubble Deep Field (HDF)
  میدان ِ ژرف ِ هابل   
meydân-e žarf-e Hubble (#)

Fr.: champ profond de Hubble   

An image of a small region in the constellation → Ursa Major, based on the results of a series of observations by the → Hubble Space Telescope. The image was assembled from 342 separate exposures taken over ten consecutive days between December 18 and December 28, 1995. It covers an area 144 arcseconds across.

Hubble; → deep; → field.