I primi passi di una stella bambina
La potenza dell’ Atacama Large Millimeter/submillimeter Array (ALMA) svela due immensi getti dall'aspetto granuloso e dalla simmetria quasi perfetta, costituiti da gas denso che proviene da una singola sorgente al centro di quest’immagine. All'origine di questi getti si trova una stella estremamente giovane - chiamata protostella - che sta iniziando il suo lungo viaggio per diventare una stella molto simile al Sole.
La stella bambina, conosciuta come CARMA-7, e i suoi getti si trovano approssimativamente a 1400 anni-luce dalla Terra, nell’ammasso di stelle Serpens South star cluster. Questo denso ammasso, che si trova ovviamente nella costellazione del Serpente ospita più di 30 protostelle che nascono in prossimità del nostro sistema solare, fornendo agli astronomi un magnifico laboratorio per studiare le interazioni tra le stelle e il loro ambiente.
I primi passi della vita di una stella non sono ancora ben conosciuti, ma gli astronomi pensano che questi getti opachi e dall'aspetto globulare siano causati da esplosioni periodiche di gas, espulsi a tremende velocità da CARMA-7 nelle regioni circostanti. Queste esplosioni sono innescate dal materiale che cade sulla protostella da un disco orbitante. I getti, allontanandosi dalla stella bambina, entrano in collisione con il materiale interstellare che li rallenta e li diffonde. Un giorno, questo materiale potrebbe collassare e formare un’altra generazione di stelle.
Crediti:ESO/A. Plunkett
Riguardo l'immagine
| Identificazione: | potw1545a |
| Lingua: | it-ch |
| Tipo: | Osservazione |
| Data di rilascio: | Lunedì 09 Novembre 2015 10:00 |
| Grandezza: | 3536 x 1172 px |
Riguardo all'oggetto
| Nome: | Serpens Constellation |
| Tipo: | Milky Way : Star : Evolutionary Stage : Protostar |
| Distanza: | 1400 Anni luce |
Formati delle immagini
Colori e filtri
| Banda | Lunghezza d'onda | Telescopio |
|---|---|---|
| Millimetro Band 6 | 1.31 mm | Atacama Large Millimeter/submillimeter Array |
Our use of Cookies
We use cookies that are essential for accessing our websites and using our services. We also use cookies to analyse, measure and improve our websites’ performance, to enable content sharing via social media and to display media content hosted on third-party platforms.
ESO Cookies Policy
The European Organisation for Astronomical Research in the Southern Hemisphere (ESO) is the pre-eminent intergovernmental science and technology organisation in astronomy. It carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities for astronomy.
This Cookies Policy is intended to provide clarity by outlining the cookies used on the ESO public websites, their functions, the options you have for controlling them, and the ways you can contact us for additional details.
What are cookies?
Cookies are small pieces of data stored on your device by websites you visit. They serve various purposes, such as remembering login credentials and preferences and enhance your browsing experience.
Categories of cookies we use
Essential cookies (always active): These cookies are strictly necessary for the proper functioning of our website. Without these cookies, the website cannot operate correctly, and certain services, such as logging in or accessing secure areas, may not be available; because they are essential for the website’s operation, they cannot be disabled.
Functional Cookies: These cookies enhance your browsing experience by enabling additional features and personalization, such as remembering your preferences and settings. While not strictly necessary for the website to function, they improve usability and convenience; these cookies are only placed if you provide your consent.
Analytics cookies: These cookies collect information about how visitors interact with our website, such as which pages are visited most often and how users navigate the site. This data helps us improve website performance, optimize content, and enhance the user experience; these cookies are only placed if you provide your consent. We use the following analytics cookies.
Matomo Cookies:
This website uses Matomo (formerly Piwik), an open source software which enables the statistical analysis of website visits. Matomo uses cookies (text files) which are saved on your computer and which allow us to analyze how you use our website. The website user information generated by the cookies will only be saved on the servers of our IT Department. We use this information to analyze www.eso.org visits and to prepare reports on website activities. These data will not be disclosed to third parties.
On behalf of ESO, Matomo will use this information for the purpose of evaluating your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage.
Matomo cookies settings:
Additional Third-party cookies on ESO websites: some of our pages display content from external providers, e.g. YouTube.
Such third-party services are outside of ESO control and may, at any time, change their terms of service, use of cookies, etc.
YouTube: Some videos on the ESO website are embedded from ESO’s official YouTube channel. We have enabled YouTube’s privacy-enhanced mode, meaning that no cookies are set unless the user actively clicks on the video to play it. Additionally, in this mode, YouTube does not store any personally identifiable cookie data for embedded video playbacks. For more details, please refer to YouTube’s embedding videos information page.
Cookies can also be classified based on the following elements.
Regarding the domain, there are:
- First-party cookies, set by the website you are currently visiting. They are stored by the same domain that you are browsing and are used to enhance your experience on that site;
- Third-party cookies, set by a domain other than the one you are currently visiting.
As for their duration, cookies can be:
- Browser-session cookies, which are deleted when the user closes the browser;
- Stored cookies, which stay on the user's device for a predetermined period of time.
How to manage cookies
Cookie settings: You can modify your cookie choices for the ESO webpages at any time by clicking on the link Cookie settings at the bottom of any page.
In your browser: If you wish to delete cookies or instruct your browser to delete or block cookies by default, please visit the help pages of your browser:
Please be aware that if you delete or decline cookies, certain functionalities of our website may be not be available and your browsing experience may be affected.
You can set most browsers to prevent any cookies being placed on your device, but you may then have to manually adjust some preferences every time you visit a site/page. And some services and functionalities may not work properly at all (e.g. profile logging-in, shop check out).
Updates to the ESO Cookies Policy
The ESO Cookies Policy may be subject to future updates, which will be made available on this page.
Additional information
For any queries related to cookies, please contact: pdprATesoDOTorg.
As ESO public webpages are managed by our Department of Communication, your questions will be dealt with the support of the said Department.