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: 464
Lyot filter
  پالایه‌ی ِ لی‌یو   
pâlâye-ye Lyot (#)

Fr.: filtre de Lyot   

A type of narrow-band filter consisting of a series of birefringent crystals and polarizers invented by the French astronomer Bernard Lyot (1897-1952) for isolating and observing significant wavelengths of solar light.

Lyot division; → filter.

Lyra
  چنگ   
Cang (#)

Fr.: Lyre   

The Lyre. A small, bright constellation in the northern hemisphere at about 19h right ascension, 40° declination. The brightest star in Lyra is → Vega.

L. lyra, from Gk. lyra, a foreign word of uncertain origin.

Cang "harp," frpm Mid.Pers. cang "harp."

Lyrids
  چنگیان   
Cangiyân (#)

Fr.: Lyrides   

A meteor shower that occurs between 18 and 24 April. Its radiant is in the constellation → Lyra.

Lyra + → -ids.

Lysithea (Jupiter X)
  لوسیته‌آ   
Lusitea (#)

Fr.: Lysithéa   

The eleventh of Jupiter's known satellites; it is 36 km across and orbits Jupiter at a distance of about 11,720,000 km with a period of 259 days. It was discovered by S. Nicholson in 1938.

Lysithea was a daughter of Oceanus and one of Zeus' lovers.

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