File:NGC7038 - HST - Potw2245a.jpg
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Summary
DescriptionNGC7038 - HST - Potw2245a.jpg |
English: Investigating A Made-to-Measure Galaxy
The distances to astronomical objects are determined using an interconnected chain of measurement techniques called the Cosmic Distance Ladder. Each rung in the ladder is calibrated by earlier steps, based on measurements of objects closer to us. This makes the accuracy of distances at the largest scales dependent on how accurately distances to nearby objects can be determined. Hubble inspected NGC 7038 with its Wide Field Camera 3 to calibrate two of the most common distance measurement techniques: type 1A supernovae and Cepheid variables. One of Hubble's original science goals was to accurately establish distances to night-sky objects, and over its three decades of operation Hubble’s increasingly precise distance measurements have contributed to one of the most intriguing unsolved problems in astronomy. Distance measurements are used to derive a quantity known as the Hubble constant, which captures how fast the Universe is expanding. As astronomer’s measurements of the Hubble constant have become more precise, their value has become increasingly inconsistent with the value of the Hubble Constant derived from observations of the Big Bang’s afterglow. Astronomers have been unable to explain the mismatch between the two values of the Hubble constant, which suggests that a new discovery in cosmology is waiting to be made. [Image description: An enormous spiral galaxy fills half of the frame, in the centre. It is oval-shaped, with four blue spiral arms winding around it. The galaxy’s centre shines brightly with pale yellow light. Thin strands of orange dust are spread around the centre, following the paths of the arms. Above and below the galaxy, very many small stars and galaxies are visible on the black background.] Credit: ESA/Hubble & NASA, D. Jones Acknowledgement: G. Anand, L. Shatz
Coordinates Position (RA): 11 46 40.80 Position (Dec): -3° 51' 9.14" Field of view: 3.02 x 3.34 arcminutes Orientation: North is 33.3° right of vertical Colours & filters Band Wavelength Telescope Optical G 474 nm Víctor M. Blanco 4-meter Telescope DECam Optical R 644 nm Víctor M. Blanco 4-meter Telescope DECam Optical Z 919 nm Víctor M. Blanco 4-meter Telescope DECam Optical V 606 nm Hubble Space Telescope ACS. |
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Date | 7 November 2022, 06:00(released) | |||
Source | https://esahubble.org/images/potw2245a/ | |||
Author |
Credit: ESA/Hubble & NASA, D. Jones Acknowledgement: G. Anand, L. Shatz |
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Permission (Reusing this file) |
![]() ![]() This file is licensed under the Creative Commons Attribution 4.0 International license. Attribution: Credit:
ESA/Hubble & NASA, D. Jones Acknowledgement: G. Anand, L. Shatz
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:46, 7 November 2022 | ![]() | 4,059 × 3,859 (4.3 MB) | imagescommonswiki>Fabian RRRR | == {{int:filedesc}} == {{Information |description={{en|1='''Investigating A Made-to-Measure Galaxy Investigating A Made-to-Measure Galaxy The spiral arms of the galaxy NGC 7038 wind languidly across this image from the NASA/ESA Hubble Space Telescope. NGC 7038 lies around 220 million light-years from Earth in the southern constellation Indus. This image portrays an especially rich and detailed view of a spiral galaxy, and exposes a huge number of distant stars and galaxies around it. That’s... |
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- File:NGC7038 - HST - Potw2245a.jpg from Wikimedia Commons
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Metadata
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Image title |
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Date and time of data generation | 06:00, 7 November 2022 |
Software used | Adobe Photoshop 23.5 (Windows) |
File change date and time | 20:46, 1 November 2022 |
Date and time of digitizing | 17:13, 1 September 2022 |
Date metadata was last modified | 21:46, 1 November 2022 |
Source | ESA/Hubble |
Credit/Provider | ESA/Hubble & NASA, D. Jones Acknowledgement: G. Anand, L. Shatz |
Unique ID of original document | xmp.did:acfcb41f-6cd1-b046-9bc6-452875dbdb58 |
Short title |
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Keywords | NGC 7038 |
Contact information |
ESA Office, Space Telescope Science Institute, 3700 San Martin Dr Baltimore, MD, 21218 United States |
Usage terms |
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IIM version | 4 |