Hiding in Plain Sight

Esahubble_potw2221a_1024

esahubble_potw2221a May 23rd, 2022

Credit: ESA/Hubble & NASA, F. Ferraro

The muted red tones of the globular cluster Liller 1 are partially obscured in this image by a dense scattering of piercingly blue stars. In fact, it is thanks to Hubble’s Wide Field Camera 3 (WFC3) that we are able to see Liller 1 so clearly in this image, because the WFC3 is sensitive to wavelengths of light that the human eye cannot detect. Liller 1 is only 30 000 light-years from Earth — relatively neighbourly in astronomical terms — but it lies within the Milky Way’s ‘bulge’, the dense and dusty region at our galaxy’s centre. Because of that, Liller 1 is heavily obscured from view by interstellar dust, which scatters visible light (particularly blue light) very effectively. Fortunately, some infrared and red visible light are able to pass through these dusty regions. WFC3 is sensitive to both visible and near-infrared (infrared that is close to the visible) wavelengths, allowing us to see through the obscuring clouds of dust, and providing this spectacular view of Liller 1.  Liller 1 is a particularly interesting globular cluster, because unlike most of its kind, it contains a mix of very young and very old stars. Globular clusters typically house only old stars, some nearly as old as the Universe itself. Liller1 instead contains at least two distinct stellar populations with remarkably different ages: the oldest one is 12 billion years old and the youngest component is just 1-2 billion years old. This led astronomers to conclude that this stellar system was able to form stars over an extraordinary long period of time.  Links Video of A Hiding in Plain Sight

Provider: Hubble Space Telescope | ESA

Image Source: https://esahubble.org/images/potw2221a/

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

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
Liller 1
Subject - Milky Way
Star > Grouping > Cluster > Globular
Esahubble_potw2221a_128
 

Position Details

Position (ICRS)
RA = 17h 33m 24.4s
DEC = -33° 23’ 22.5”
Orientation
North is 91.0° CCW
Field of View
2.9 x 1.5 arcminutes
Constellation
Scorpius

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_potw2221a_1280
×
ID
potw2221a
Subject Category
B.3.6.4.2  
Subject Name
Liller 1
Credits
ESA/Hubble & NASA, F. Ferraro
Release Date
2022-05-23T06:00:00
Lightyears
Redshift
Reference Url
https://esahubble.org/images/potw2221a/
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
263.3518550778258, -33.38959623060938
Reference Dimension
3474.0, 1819.0
Reference Pixel
1737.0, 909.5
Scale
-1.3893976300232568e-05, 1.3893976300232568e-05
Rotation
90.980000000000032
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
potw2221a
Metadata Date
2022-05-06T16:34:58+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.