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yll Am

Peculiar star whose metallic lines are as strong as those of the F stars but whose hydrogen lines are so strong as to require that they be classed with the A stars. They are generally short-period (<300d) spectroscopic binaries with high atmospheric turbulence and variable spectra, and are slower rotators than normal A stars.

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التحسين
  • نوع المصطلح: اسم
  • المرادف (المرادفات)
  • مسرد المصطلحات
  • المجال / النطاق: علم الفلك
  • الفئة: فلك عام
  • Company: Caltech
  • المنتج:
  • الاختصار-المختصر:
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mollë yll
فواكه وخضروات; فواكه

The purple, white, green, yellow, or rose-colored fruit of a West Indian tree. When cut open, the seeds are disposed into the shape of a star. Also called "caimit."

yll Ap
علم الفلك; فلك عام

1) Peculiar A-type stars ("magnetic" A stars) that show abnormally strong lines, sometimes of varying intensity, of certain ionized metals. Recent evidence indicates that all Ap ...

yll Ae
علم الفلك; فلك عام

A-type star with emission in one or several Balmer lines.

Një yll
علم الفلك; فلك عام

Star with spectral type A in which the spectrum of the Balmer lines of hydrogen attain their greatest strength. Helium lines can no longer be seen. Some metallic lines are ...

vit julian
علم الفلك; فلك عام

Exactly 365. 25 days, in which a century (100 years) is exactly 36525 days and in which 1900. 0 corresponds exactly to 1900 January 0. 5 (from the Julian-date system, which is ...

heliocentrik
علم الفلك; فلك عام

Referring to the sun. A heliocentric orbit is one based on the sun as one of the two foci of the (elliptical) orbit (or as the center of a circular orbit); a heliocentric ...

datë juliane
علم الفلك; فلك عام

The interval of time in days (and fraction of a day) since Greenwich noon on Jan. 1, 4713 BC. The JD is always half a day off from Universal Time, because the current definition ...

ekuinoks
علم الفلك; فلك عام

Either of the two points (vernal, autumnal) on the celestial sphere where the ecliptic (which is the apparent path of the sun on the sky) intersects the celestial equator. Due to ...

shtrirje
علم الفلك; فلك عام

Angular distance of a celestial object from the sun in the sky. In standard ephemerides, this is usually denoted by the Greek letter epsilon (or by the abbreviation "Elong. "). A ...

pjerrësi
علم الفلك; فلك عام

One element of the astronomical coordinate system on the sky that is used by astronomers. Declination, which can be thought of as latitude on the earth projected onto the sky, is ...

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