File:A Closer Look at Hubble’s 31st Anniversary Snapshot.jpg
Page contents not supported in other languages.
Tools
Actions
General
In other projects
Appearance
![File:A Closer Look at Hubble’s 31st Anniversary Snapshot.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/5/58/A_Closer_Look_at_Hubble%E2%80%99s_31st_Anniversary_Snapshot.jpg/600px-A_Closer_Look_at_Hubble%E2%80%99s_31st_Anniversary_Snapshot.jpg)
Size of this preview: 600 × 600 pixels. Other resolutions: 240 × 240 pixels | 480 × 480 pixels | 768 × 768 pixels | 1,025 × 1,024 pixels | 1,918 × 1,917 pixels.
Original file (1,918 × 1,917 pixels, file size: 690 KB, MIME type: image/jpeg)
![]() | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
DescriptionA Closer Look at Hubble’s 31st Anniversary Snapshot.jpg |
English: This comparison view shows puffing dust bubbles and an erupting gas shell— the final acts of a monster star.You can explore the detail of the nebula surrounding the star AG Carinae by using the slider tool on the image above. This Picture of the Week showcases new views of the dual nature of the star AG Carinae, which was the target of the NASA/ESA Hubble Space Telescope’s 31st anniversary image in April 2020. This new perspective was developed thanks to Hubble’s observations of the star in 2020 and 2014, along with others captured by the telescope’s WFPC2 instrument in 1994. You can compare these two new versions of AG Carinae by using the slider tool on the image above. The first image showcases the details of the ionised hydrogen and ionised nitrogen emissions from the nebula (seen here in red). In the second image, the blue demonstrates the contrasting appearance of the distribution of the dust that shines of reflected stellar light. Astronomers believe that the dust bubbles and filaments formed within and were shaped by powerful stellar wind . This giant star is waging a tug-of-war between gravity and radiation to avoid self-destruction. The star is surrounded by an expanding shell of gas and dust — a nebula — that is shaped bythe powerful winds emanating from the star. The nebula is about five light-years wide, equal to the distance from here to our nearest star, Alpha Centauri. AG Carinae is formally classified as a Luminous Blue Variable because it is hot (blue), very luminous, and variable. Such stars are quite rarebecause there are not many stars that are so massive. Luminous Blue Variable stars continuously lose mass in the final stages of their life, during which a significant amount of stellar material is ejected into the surrounding interstellar space, until enough mass has been lost that the star has reached a stable state. AG Carinae is surrounded by a spectacular nebula, formed by material ejected by the star during several of its past outbursts. The nebula is approximately 10 000 years old, and the observed velocity of the gas is approximately 70 kilometres per second. While this nebula lookslike a ring, it is in fact a hollow shell rich in gas and dust, the centre of which has been cleared by the powerful stellar wind travelling at roughly 200 kilometres per second. The gas (composed mostly of ionised hydrogen and nitrogen) is visible to us in these images as a thick bright red ring,which appears doubled in places — possibly the result of several outbursts colliding into each other. The dust, here visible in blue, has formed in clumps, bubbles and filaments that are shaped by the stellar wind. Scientists who observed the star and its surrounding nebula note that the ring isnot perfectly spherical; it appears to have a bipolar symmetry, indicating that the mechanism producing the outburst may have been caused by the presence of a disc in the centre, or that the star is not alone but might have a companion (known as a binary star). An alternative and simpler theory isthat the star rotates very fast (as many massive stars have been found to do). |
Date | |
Source | https://esahubble.org/images/potw2137b/ |
Author | ESA/Hubble and NASA, A. Nota, C. Britt |
Licensing
![]() ![]() |
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:
|
![]() |
![w:en:Creative Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/CC_some_rights_reserved.svg/90px-CC_some_rights_reserved.svg.png)
![attribution](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Cc-by_new_white.svg/24px-Cc-by_new_white.svg.png)
This file is licensed under the Creative Commons Attribution 4.0 International license.
Attribution: ESA/Hubble
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
Captions
Add a one-line explanation of what this file represents
Items portrayed in this file
depicts
image/jpeg
e4b9e03e17bf04082da72c71c068a4fbc8554906
706,767 byte
1,917 pixel
1,918 pixel
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 20:35, 28 September 2021 | ![]() | 1,918 × 1,917 (690 KB) | Pandreve | Uploaded a work by ESA/Hubble and NASA, A. Nota, C. Britt from https://esahubble.org/images/potw2137b/ with UploadWizard |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Source | ESA/Hubble |
---|---|
Credit/Provider | ESA/Hubble and NASA, A. Nota, C. Britt |
Short title |
|
Image title |
|
Usage terms |
|
Date and time of data generation | 06:00, 13 September 2021 |
JPEG file comment | This Picture of the Week showcases a new view of the star AG Carinae, which was the target of the NASA/ESA Hubble Space Telescope’s 31st anniversary image in April 2020. The ESA/Hubble team has applied new processing techniques to Hubble’s 2020 observations of the star, as well as to others made in 2014, to create this stunning new image. You can compare the two versions of AG Carinae online by using the slider tool on the image above.This giant star is waging a tug-of-war between gravity and radiation to avoid self-destruction. The star is surrounded by an expanding shell of gas and dust — a nebula — that is shaped by the powerful winds emanating from the star. The nebula is about five light-years wide, equal to the distance from here to our nearest star, Alpha Centauri. This new view of AG Carinae also includes data from one of the early observations of the target, captured by Hubble's WFPC2 instrument in May of 1994. That dataset has allowed the ESA/Hubble image team to recover details of the central bright star, as long exposures taken recently with Hubble's newer WFC3 instrument had to overexpose the central star in order to capture fainter details of the surrounding nebula. Additionally, this new view integrated six sharpening techniques that were carefully applied to further enhance details of the ionised hydrogen and ionised nitrogen emissions in the nebula (seen here in reds) and reflected near ultraviolet light (seen here in blues). |
Software used | Adobe Photoshop 22.4 (Windows) |
File change date and time | 03:22, 30 June 2021 |
Date and time of digitizing | 13:56, 5 May 2021 |
Date metadata was last modified | 05:22, 30 June 2021 |
Unique ID of original document | xmp.did:b152f1b4-63d1-454d-972c-4b5497035317 |
Keywords | AG Carinae |
Contact information |
ESA Office, Space Telescope Science Institute, 3700 San Martin Dr Baltimore, MD, 21218 United States |
IIM version | 4 |