Bestand:Hubble captures glittering crowded hub of our Milky Way.jpg
Oorspronkelijk bestand (3.336 × 2.823 pixels, bestandsgrootte: 5,12 MB, MIME-type: image/jpeg)
Dit is een bestand van Wikimedia Commons. Onderstaande beschrijving komt van de beschrijving van het bestand daar. |
Beschrijving
BeschrijvingHubble captures glittering crowded hub of our Milky Way.jpg |
English: This image from the NASA/ESA Hubble Space Telescope shows a sparkling jewel box full of stars captured the heart of our Milky Way.
Aging red giant stars coexist with their more plentiful younger cousins, the smaller, white, Sun-like stars, in this crowded region of our galaxy’s ancient central hub, or bulge. Most of the bright blue stars in the image are probably recently formed stars located in the foreground, in the galaxy's disc. Astronomers studied 10 000 of these Sun-like stars in archival Hubble images over a nine-year period to unearth clues to our galaxy’s evolution. The study reveals that the Milky Way’s bulge is a dynamic environment of variously aged stars zipping around at different speeds, like travelers bustling about a busy airport. The researchers found that the motions of bulge stars are different, depending on a star’s chemical composition. Stars richer in elements heavier than hydrogen and helium have less disordered motions, but are orbiting around the galactic centre faster than older stars that are deficient in heavier elements. The image is a composite of exposures taken in near-infrared and visible light with Hubble’s Wide Field Camera 3. The observations are part of two Hubble surveys: the Galactic Bulge Treasury Program and the Sagittarius Window Eclipsing Extrasolar Planet Search. The centre of our galaxy is about 26 000 light-years away. |
Datum | |
Bron | https://spacetelescope.org/images/opo1801a/ |
Auteur | NASA, ESA, and T. Brown (STScI), W. Clarkson (University of Michigan-Dearborn), and A. Calamida and K. Sahu (STScI) |
Licentie
ESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the {{PD-Hubble}} tag.
Conditions:
Notes:
|
- De gebruiker mag:
- Delen – het werk kopiëren, verspreiden en doorgeven
- Remixen – afgeleide werken maken
- Onder de volgende voorwaarden:
- naamsvermelding – U moet op een gepaste manier aan naamsvermelding doen, een link naar de licentie geven, en aangeven of er wijzigingen in het werk zijn aangebracht. U mag dit op elke redelijke manier doen, maar niet zodanig dat de indruk wordt gewekt dat de licentiegever instemt met uw werk of uw gebruik van zijn werk.
Items getoond in dit bestand
beeldt af
12 jan 2018
Bestandsgeschiedenis
Klik op een datum/tijd om het bestand te zien zoals het destijds was.
Datum/tijd | Miniatuur | Afmetingen | Gebruiker | Opmerking | |
---|---|---|---|---|---|
huidige versie | 15 jan 2018 18:54 | 3.336 × 2.823 (5,12 MB) | Jmencisom | User created page with UploadWizard |
Bestandsgebruik
Dit bestand wordt op de volgende pagina gebruikt:
Globaal bestandsgebruik
De volgende andere wiki's gebruiken dit bestand:
- Gebruikt op bn.wikipedia.org
- Gebruikt op en.wikipedia.org
- Gebruikt op pt.wikipedia.org
- Gebruikt op simple.wikipedia.org
Metadata
Dit bestand bevat metadata met EXIF-informatie, die door een fotocamera, scanner of fotobewerkingsprogramma toegevoegd kan zijn.
Credit/Leverancier | NASA, ESA, and T. Brown (STScI), W. Clarkson (University of Michigan-Dearborn), and A. Calamida and K. Sahu (STScI) |
---|---|
Bron | ESA/Hubble |
Korte naam |
|
Omschrijving afbeelding |
|
Contactgegevens |
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
Gebruiksvoorwaarden |
|
IIM-versie | 4 |
Opmerking bij JPEG-bestand | Every star has a story to tell. Study a star and it will give you information about its composition, age and possibly even clues to where it first formed. The stars residing in the oldest structure of our Milky Way galaxy, the central bulge, offer insight into how our pinwheel-shaped island of myriad stars evolved over billions of years. Think of our Milky Way as a pancake-shaped structure with a big round dollop of butter in the middle — that would be our galaxy’s central hub. For many years, astronomers had a simple view of our Milky Way’s bulge as a quiescent place composed of old stars, the earliest homesteaders of our galaxy. A new analysis of about 10,000 normal sun-like stars in the bulge reveals that our galaxy’s hub is a dynamic environment of various ages zipping around at different speeds, like travelers bustling about a busy airport. This conclusion is based on nine years’ worth of archival data from the Hubble Space Telescope. The faster-moving and later-generation stars may have arrived at the hub through our Milky Way cannibalizing smaller galaxies. They mingle with a different population of older, slowing-moving stars. Currently, only Hubble has sharp enough resolution to simultaneously measure the motions of thousands of sun-like stars at the distance of the galaxy’s bulge. |