1) žarf (#), gowd (#); 2) žarfnâ (#)
Fr.: 1) profond; 2) profondeur
1a) General: Extending well inward from an outer surface or back from an edge.
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."
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.
Fr.: champ profond
An area on the sky whose image is obtained with a deep exposure, such as → Hubble Deep Field.
Fr.: image profonde
An image obtained using a deep exposure to reveal the weak features of the object.
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-).
Hubble Deep Field (HDF)
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.