Variable star
A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates. This variation may be caused by a change in emitted light or by something partly blocking the light, so variable stars are classified as either:
* Intrinsic variables, whose luminosity actually changes; for example, because the star periodically swells and shrinks.
* Extrinsic variables, whose apparent changes in brightness are due to changes in the amount of their light that can reach Earth; for example, because the star has an orbiting companion that sometimes eclipses it.
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Eclipsing Variable starEruptive variableExtrinsic variableFK Comae Berenices variableFK Comae starIntrinsic variableLong secondary period variablePlanetary transit variablePulsating starPulsating variableR corona borealis starRotating variableStellar variationVariable-starVariable star (disambiguation)Variable starsZ Andromedae variable
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Variable star
A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates. This variation may be caused by a change in emitted light or by something partly blocking the light, so variable stars are classified as either:
* Intrinsic variables, whose luminosity actually changes; for example, because the star periodically swells and shrinks.
* Extrinsic variables, whose apparent changes in brightness are due to changes in the amount of their light that can reach Earth; for example, because the star has an orbiting companion that sometimes eclipses it.
has abstract
25بك المحتوى هنا ينقصه الاستشه ...... افة بيننا وبين المجرات الأخرى.
@ar
A variable star is a star whos ...... % over an 11-year solar cycle.
@en
En astronomie, une étoile vari ...... e temps beaucoup plus courtes.
@fr
Gwiazda zmienna – gwiazda, któ ...... o ok. 0,1% w 11-letnim cyklu.
@pl
Las estrellas variables son es ...... nte un ciclo solar de 11 años.
@es
Por definição, uma estrela var ...... os de tempo muito mais curtos.
@pt
Una stella variabile è una ste ...... ante il suo undecennale ciclo.
@it
Veranderlijke sterren of varia ...... een perspectivisch effect is.
@nl
Veränderliche Sterne, variable ...... erlichen“ Sternen relativiert.
@de
Переме́нная звезда́ — звезда, ...... из космоса звёзды не мерцают.
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743,733,854
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25بك المحتوى هنا ينقصه الاستشه ...... المتفجرة. 3- النجوم الثنائية.
@ar
A variable star is a star whos ...... on that sometimes eclipses it.
@en
En astronomie, une étoile vari ...... e temps beaucoup plus courtes.
@fr
Gwiazda zmienna – gwiazda, któ ...... o ok. 0,1% w 11-letnim cyklu.
@pl
Las estrellas variables son es ...... nte un ciclo solar de 11 años.
@es
Por definição, uma estrela var ...... os de tempo muito mais curtos.
@pt
Una stella variabile è una ste ...... elle variabili si dividono in:
@it
Veranderlijke sterren of varia ...... een perspectivisch effect is.
@nl
Veränderliche Sterne, variable ...... he Arten von Veränderlichkeit:
@de
Переме́нная звезда́ — звезда, ...... ы однажды претерпел изменение.
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label
Estrela variável
@pt
Estrella variable
@es
Gwiazda zmienna
@pl
Stella variabile
@it
Variable star
@en
Veranderlijke ster
@nl
Veränderlicher Stern
@de
Étoile variable
@fr
Переменная звезда
@ru
نجم متغير
@ar