A green cosmic arc

Esahubble_potw1822a_1024

esahubble_potw1822a May 28th, 2018

Credit: ESA/Hubble & NASA Acknowledgement: Judy Schmidt (Geckzilla)

This NASA/ESA Hubble Space Telescope image shows a cluster of hundreds of galaxies located about 7.5 billion light-years from Earth. The brightest galaxy within this cluster named SDSS J1156+1911 and known as the Brightest Cluster Galaxy (BCG), is visible in the lower middle of the frame. It was discovered by the Sloan Giant Arcs Survey which studied data maps covering huge parts of the sky from the Sloan Digital Sky Survey: it found more than 70 galaxies that look to be significantly affected by a cosmic phenomenon known as gravitational lensing. Gravitational lensing is one of the predictions of Albert Einstein's General Theory of Relativity. The mass contained within a galaxy is so immense that it can actually warp and bend the very fabric of its surroundings (known as spacetime), forcing the light to travel along curved paths. As a result, the image of a more distant galaxy appears distorted and amplified to an observer, as the light from it has been bent around the intervening galaxy. This effect can be very useful in astronomy, allowing astronomers to see galaxies that are either obscured or too distant for us to be otherwise detected by our current instruments. Galaxy clusters are giant structures containing hundreds to thousands of galaxies with masses of about over one million billion times the mass of the Sun! SDSS J1156+1911 is only roughly 600 billion times the mass of the Sun, making it less massive than the average galaxy. However, it is massive enough to produce the fuzzy greenish streak seen just below the brightest galaxy the lensed image of a more distant galaxy.

Image Source: https://www.spacetelescope.org/images/potw1822a/

Curator: ESA/Hubble, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
SDSS J1156+1911
Subject - Distant Universe
Galaxy > Grouping > Cluster
Esahubble_potw1822a_128
 

Position Details

Position (ICRS)
RA = 11h 56m 5.0s
DEC = 19° 11’ 35.2”
Orientation
North is 18.2° CCW
Field of View
2.3 x 2.0 arcminutes
Constellation
Leo

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_red Hubble Space Telescope (WFC3) Infrared (H) 1.6 µm
Arrow_left_orange Hubble Space Telescope (WFC3) Infrared (J) 1.3 µm
Arrow_left_cyan Hubble Space Telescope (ACS) Optical (I) 814.0 nm
Arrow_left_blue Hubble Space Telescope (ACS) Optical (C) 390.0 nm
Spectrum_base
Arrow_top_red
Arrow_top_orange
Arrow_top_cyan
Arrow_top_blue
Esahubble_potw1822a_1280
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ID
potw1822a
Subject Category
D.5.5.3  
Subject Name
SDSS J1156+1911
Credits
ESA/Hubble & NASA Acknowledgement: Judy Schmidt (Geckzilla)
Release Date
2018-05-28T06:00:00
Lightyears
Redshift
Reference Url
https://www.spacetelescope.org/images/potw1822a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
WFC3, WFC3, ACS, ACS
Color Assignment
Red, Orange, Cyan, Blue
Band
Infrared, Infrared, Optical, Optical
Bandpass
H, J, I, C
Central Wavelength
1600, 1250, 814, 390
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
179.020983137, 19.193097394
Reference Dimension
3461.0, 3037.0
Reference Pixel
1730.5, 1518.5
Scale
-1.1006597457e-05, 1.1006597457e-05
Rotation
18.199999999999957
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
ESA/Hubble
URL
http://www.spacetelescope.org
Name
Email
Telephone
Address
Karl-Schwarzschild-Strasse 2
City
Garching bei München
State/Province
Postal Code
D-85748
Country
Germany
Rights
Creative Commons Attribution 4.0 International License
Publisher
ESA/Hubble
Publisher ID
esahubble
Resource ID
potw1822a
Metadata Date
2018-03-14T08:53:39+01:00
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.