File:A donut in the sky (potw2220a).tiff
Original file (4,413 × 2,164 pixels, file size: 8.75 MB, MIME type: image/tiff)
Captions
Summary
[edit]DescriptionA donut in the sky (potw2220a).tiff |
English: On 12 May 2022, a global network of astronomers from the Event Horizon Telescope Collaboration revealed the first image of the supermassive black hole at the heart of our Milky Way galaxy. This black hole, called Sagittarius A* or Sgr A*, lies 27 000 light years away, and its shadow is only 52 micro-arcseconds wide on the sky. That’s about the size of a donut on the surface of the moon as seen from Earth! This tiny speck is not visible even to the largest individual telescope. The Event Horizon Telescope combines data from multiple radio telescopes located all across the globe, including ALMA and APEX, co-owned by ESO. This effectively creates one giant, “Earth-sized virtual telescope, using a technique known as very-long-baseline interferometry. Scientists then use a series of complex algorithms to sift through the data and reconstruct the image we see today.Black holes cannot be directly imaged as they are completely dark, but astronomers can measure the radio waves emitted by the superheated glowing gas and dust surrounding them, creating the donut-like shape we see in the image of Sgr A*.Links: |
||
Date | 16 May 2022 (upload date) | ||
Source |
|
||
Author | EHT Collaboration, ESO/M. Kornmesser, NASA, Lu Amaral | ||
Other versions |
|
Licensing
[edit]This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
This file is licensed under the Creative Commons Attribution 4.0 International license.
|
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 12:39, 15 August 2023 | 4,413 × 2,164 (8.75 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://cdn.eso.org/images/original/potw2220a.tif via Commons:Spacemedia |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Width | 4,413 px |
---|---|
Height | 2,164 px |
Bits per component |
|
Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 19 |
Horizontal resolution | 100 dpi |
Vertical resolution | 100 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 23.3 (Windows) |
File change date and time | 14:49, 13 May 2022 |
Color space | sRGB |