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Inside Tabby's Star

Bryce Abstract posted on Jan 29, 2019
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Description


Tabby's Star KIC 8462852 is a yellow-white star of the main sequence located in the constellation Cygnus at about 454 parsecs (1,480 light years) from the Earth. It was the subject of media attention in October 2015 because of unusual variations in brightness. She is sometimes nicknamed "Tabby Star" or "Boyajian Star" according to Tabetha S. Boyajian. In September 2015, several astronomers published a document analyzing the unusual light fluctuations of the star, as measured by the Kepler Space Telescope, a probe which records the brightness variations of stars in distant orbit to detect exoplanets. The irregular changes in brightness of the star seem to indicate a large mass (or many small masses together) in orbit around the star in "tight formation". Hypotheses have been proposed to explain the variations unusual light. The star received intense media attention in October 2015, with speculation that unusual variations of light could be signs of associated activity to an intelligent extraterrestrial life. Two astronomers (Montet and Simon) delivered the results of their investigation in a publication early August 2016. They find that during the first two and a half years of observation, the brightness of the star has dropped steadily to reach a decrease of 0.9% in total, then this decrease in brightness accelerated to 2% in 200 days. Astronomers do not offer an explanation to explain their observations. They propose, however, that this drop in brightness would not come from the star itself, but could be due obstruction of the star by an unidentified phenomenon to this day. _______________________________________ Étoile de Tabby KIC 8462852 est une étoile jaune-blanc de la séquence principale située dans la constellation du Cygne à environ 454 parsecs (1 480 années-lumière) de la Terre. Elle a fait l'objet d'une attention médiatique en octobre 2015 à cause de variations inhabituelles de luminosité. Elle est parfois surnommée « étoile de Tabby » ou « étoile de Boyajian » d'après Tabetha S. Boyajian. En septembre 2015, plusieurs astronomes ont publié un document analysant les fluctuations de lumière inhabituelles de l'étoile, telles que mesurées par le télescope spatial Kepler, une sonde qui enregistre les variations de luminosité d'étoiles en orbite éloignée pour détecter des exoplanètes. Les changements irréguliers de luminosité de l'étoile semblent indiquer une grande masse (ou de nombreuses petites masses ensemble) en orbite autour de l'étoile en « formation serrée ». Des hypothèses ont été proposées pour expliquer les variations inhabituelles de lumière. L'étoile a reçu une attention médiatique intense en octobre 2015, avec la spéculation que les variations inhabituelles de lumière pourraient être des signes d'activité associés à une vie extraterrestre intelligente. Deux astronomes (Montet et Simon) ont livré les résultats de leur investigation dans une publication début août 2016. Ils constatent que pendant les deux premières années et demi d'observation, la luminosité de l'étoile a baissé régulièrement pour atteindre une diminution de 0,9 % au total, puis cette diminution de luminosité s'est accélérée pour atteindre 2 % en 200 jours. Les astronomes ne proposent pas d'explication pour expliquer leurs observations. Ils proposent cependant que cette baisse de luminosité ne proviendrait pas de l'étoile, elle-même, mais pourrait être due à l'obstruction de l'étoile par un phénomène non identifié à ce jour.

Comments (15)


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miwi

5:18PM | Tue, 29 January 2019

Fantastic image,excellent info,love it!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

)

anitalee

5:32PM | Tue, 29 January 2019

Beautiful

)

BryceHoro

1:35AM | Wed, 30 January 2019

Beautifully done.

)

Kordouane

3:07AM | Wed, 30 January 2019

Excellente image et un texte très instructif 🌟

)

jmb007

4:20AM | Wed, 30 January 2019

bien

)

jendellas

5:26AM | Wed, 30 January 2019

That image is so beautiful.

)

Radar_rad-dude

12:02PM | Wed, 30 January 2019

An intelligent star! What a concept! Magnificent speculation! I love your interpretation! Bravo and many fine kudos!

)

DukeNukem2005

12:16PM | Wed, 30 January 2019

Bravo! That's very beautiful! Fine!

)

marcPoser

5:42PM | Wed, 30 January 2019
Fascinant.jpg
)

Richardphotos

8:04PM | Wed, 30 January 2019

very creative Bryce

)

Vagabund

7:11AM | Thu, 31 January 2019

Fascinating!

:-)

)

RodS

1:08PM | Thu, 31 January 2019

Very cool!

)

AureliusdeMercoeur

3:23AM | Fri, 01 February 2019

Un endroit très impressionnant ! Une belle création originale et des infos très intéressantes !

)

goodoleboy

4:15PM | Fri, 01 February 2019

Unidentified phenomena probably being orbiting planets and moons besides the alternate degrees of light on Tabby Star.AmberlgtMindBlow.jpg

)

Drakkendark

6:20PM | Wed, 10 April 2019

Very cool.


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