File:Caldwell 66 (50378832176).jpg
Original file (931 × 724 pixels, file size: 481 KB, MIME type: image/jpeg)
Captions
Summary[edit]
DescriptionCaldwell 66 (50378832176).jpg |
Caldwell 66, also known as NGC 5694, was discovered by William Herschel in 1784 and is one of the oldest, most remote globular clusters in our galaxy. Located roughly 100,000 light-years from Earth in the constellation Hydra, this collection of stars appears very faint in the sky with an apparent magnitude of 10.2. A small telescope is needed to spot the distant cluster. It can be seen best from southern locations in the Northern Hemisphere in the late spring and from the Southern Hemisphere in the autumn. Most globular clusters reside on the outskirts of a galaxy and are gravitationally bound to their galaxy. This means that the clusters will remain in orbit around the galaxy’s gravitational center. However, astronomers suspect that Caldwell 66 is traveling on an unbound, hyperbolic (or U-shaped) path around our Milky Way galaxy. The cluster is located far enough away from the galactic center that it is only loosely bound by gravity, and it is traveling through space so quickly that it will likely escape from our galaxy’s gravitational grip. This image of Caldwell 66 is a composite of observations made in visible and ultraviolet light by Hubble’s Wide Field and Planetary Camera 2. The observations were taken to help astronomers better understand the evolution of globular clusters and to more precisely determine the age of the cluster. A faint background galaxy appears near the right edge of the image. Credit: NASA, ESA, G. Fahlman (Dominion Astrophysical Observatory), R. Ibata (Université de Strasbourg), and F. Ferraro (Università di Bologna); Processing: Gladys Kober (NASA/Catholic University of America) For Hubble's Caldwell catalog website and information on how to find these objects in the night sky, visit: <a href="https://www.nasa.gov/content/goddard/hubble-s-caldwell-catalog" rel="noreferrer nofollow">www.nasa.gov/content/goddard/hubble-s-caldwell-catalog</a> |
Date | |
Source | Caldwell 66 |
Author | NASA Hubble Space Telescope |
Licensing[edit]
- 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.
This image was originally posted to Flickr by NASA Hubble at https://flickr.com/photos/144614754@N02/50378832176. It was reviewed on 16 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
16 December 2020
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 17:43, 16 December 2020 | 931 × 724 (481 KB) | Szczureq (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use 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.
Orientation | Normal |
---|---|
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop 21.2 (Macintosh) |
File change date and time | 16:27, 12 September 2020 |
Y and C positioning | Centered |
Exif version | 2.32 |
Date and time of digitizing | 15:35, 16 July 2019 |
Meaning of each component |
|
Supported Flashpix version | 1 |
Color space | sRGB |
Bits per component |
|
Compression scheme | Uncompressed |
Height | 724 px |
Width | 931 px |
Pixel composition | RGB |
Number of components | 3 |
Date metadata was last modified | 12:27, 12 September 2020 |
Unique ID of original document | xmp.did:1963c0f4-df66-4b54-9ad4-96a367c2356c |