Hubble Spies a Glittering Gathering of Stars

Esahubble_potw2220a_1024

esahubble_potw2220a May 16th, 2022

Credit: ESA/Hubble & NASA, R. Cohen

This glittering gathering of stars is the globular cluster NGC 6558, and it was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys. NGC 6558 is closer to the centre of the Milky Way than Earth is, and lies about 23 000 light years away in the constellation Sagittarius. Globular clusters like NGC 6558 are tightly bound collections of tens of thousands to millions of stars, and they can be found in a wide range of galaxies. As this observation shows, the stars in globular clusters can be densely packed; this image is thronged with stars in a rich variety of hues. Some of the brightest inhabitants of this globular cluster are surrounded by prominent diffraction spikes, which are imaging artefacts caused by starlight interacting with the inner workings of Hubble. Globular clusters equip astronomers with interesting natural laboratories in which to test their theories, as all the stars in a globular cluster formed at approximately the same time with similar initial composition. These stellar clusters therefore provide unique insights into how different stars evolve under similar conditions. This image comes from a set of observations investigating globular clusters in the inner Milky Way. Astronomers were interested in studying these globular clusters to gain greater insight into how globular clusters in the inner Milky Way form and evolve. Links Video of Hubble Spies a Glittering Gathering of Stars

Provider: Hubble Space Telescope | ESA

Image Source: https://esahubble.org/images/potw2220a/

Curator: ESA/Hubble, Baltimore, MD, United States

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
NGC 6558
Subject - General
Star > Grouping > Cluster > Globular
Esahubble_potw2220a_128
 

Position Details

Position (ICRS)
RA = 18h 10m 13.4s
DEC = -31° 45’ 52.9”
Orientation
North is 3.1° CCW
Field of View
3.4 x 3.1 arcminutes
Constellation
Sagittarius

Color Mapping

  Telescope Spectral Band Wavelength
Red Hubble (ACS) Optical (I) 814.0 nm
Green Hubble (ACS) Optical (I) 814.0 nm
Green Hubble (ACS) Optical (V) 606.0 nm
Blue Hubble (ACS) Optical (V) 606.0 nm
Spectrum_base
Red
Green
Green
Blue
Esahubble_potw2220a_1280
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ID
potw2220a
Subject Category
E.3.6.4.2  
Subject Name
NGC 6558
Credits
ESA/Hubble & NASA, R. Cohen
Release Date
2022-05-16T06:00:00
Lightyears
Redshift
Reference Url
https://esahubble.org/images/potw2220a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
ACS, ACS, ACS, ACS
Color Assignment
Red, Green, Green, Blue
Band
Optical, Optical, Optical, Optical
Bandpass
I, I, V, V
Central Wavelength
814, 814, 606, 606
Start Time
Integration Time
Dataset ID
None, None, None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
272.55566713044396, -31.764697753550998
Reference Dimension
4099.0, 3718.0
Reference Pixel
2049.5, 1859.0
Scale
-1.3882181247604153e-05, 1.3882181247604153e-05
Rotation
3.0800000000000018
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
ESA/Hubble
URL
https://esahubble.org
Name
Email
Telephone
Address
ESA Office, Space Telescope Science Institute, 3700 San Martin Dr
City
Baltimore
State/Province
MD
Postal Code
21218
Country
United States
Rights
Creative Commons Attribution 4.0 International License
Publisher
ESA/Hubble
Publisher ID
esahubble
Resource ID
potw2220a
Metadata Date
2022-05-06T22:17:33+02:00
Metadata Version
1.1
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Detailed color mapping information coming soon...

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There is no distance meta data in this image.