File:R aquarii - VLT 2012.jpg

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DescriptionR aquarii - VLT 2012.jpg	Français : Cette image révèle un système stellaire binaire spectaculaire nommé R Aquarius, situé à 700 années-lumière de la Terre, tel qu'il a été observé en 2012 par le Very Large Telescope (VLT) de l'ESO.
Date	10 December 2018, 06:00:00
Source	https://www.eso.org/public/images/potw1850a/
Author	ESO

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current	17:25, 28 March 2023		1,873 × 1,166 (587 KB)	GoldenFork (talk \| contribs)	Uploaded a work by VLT-ESO from https://cdn.eso.org/images/large/potw1850a.jpg with UploadWizard

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Credit/Provider	ESO
Source	European Southern Observatory
Short title	VLT view of binary system R Aquarii from 2012
Image title	This image reveals a dramatic binary star system named R Aquarii, located 700 light-years from Earth, as seen in 2012 by ESO’s Very Large Telescope (VLT). R Aquarii is a so-called “symbiotic binary”, comprising two stars surrounded by a large, dynamic cloud of gas (a nebula). Systems like this contain two stars in an unequal and complex relationship. R Aquarii is made up of one hot white dwarf and one red giant. The red giant is losing matter to its small companion and occasionally ejecting matter in weird spurts, loops and trails, forming the intriguing shapes seen here. There is a lot going on between the performers in this cosmic double act. The red giant is a variable star, with a brightness that changesby a factor of 750 every year and three weeks. The faint nebula is named Cederblad 211 and is thought to be the result of a violent nova 250 years ago. Also visible is a narrow, vertical, S-shaped feature, with blobs of superheated material moving outward at tremendous speeds of 600 to 850 kilometres per second. R Aquarii was also imaged 15 years ago — and several times in the intervening period — to track its ongoing activity. The system is very dynamic and complex, and has expanded and evolved significantly in recent years (an image from 1997 can be seen here, and a comparison between the two is available here).
Usage terms	Creative Commons Attribution 4.0 International License
Date and time of data generation	06:00, 10 December 2018
Software used	Adobe Photoshop CS5 Windows
File change date and time	17:37, 5 December 2018
Date and time of digitizing	07:21, 1 May 2018
Date metadata was last modified	18:37, 5 December 2018
Unique ID of original document	xmp.did:F8F516E7204BE8119447E7233BEEA708
Keywords	R Aquarii
Contact information	http://www.eso.org Karl-Schwarzschild-Strasse 2 Garching bei München, None, D-85748 Germany
IIM version	4

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