A Sky Full of Galaxies

Noirlab_iotw2110a_1024

noirlab_iotw2110a March 10th, 2021

Credit: CTIO/NOIRLab/DOE/NSF/AURAImage processing: Travis Rector (University of Alaska, Anchorage/NSF's NOIRLab), Jen Miller (Gemini Observatory/NSF's NOIRLab), Mahdi Zamani & Davide de Martin (NSF's NOIRLab)

The blackness of space is punctuated by bright dots. This image could almost be mistaken for a particularly detailed shot of the night sky as seen from Earth, full of stars. Appearances, however, can be deceptive. This image was taken from Earths southern hemisphere, but the bright dots are not stars they are galaxies. In fact, the distinctive, ring-shaped galaxy on the right is LEDA 14884. This image was built up using data from the Dark Energy Survey, an ambitious project which mapped hundreds of millions of galaxies across the Universe. This was done using the Dark Energy Camera (DECam), an instrument built by the Department of Energy and mounted at the Vctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory (CTIO), a Program of NSFs NOIRLab. Looking at this incredible image, with its thousands of wildly diverse galaxies, it is mind-boggling to recall that only about 100 years ago, most astronomers believed that our Milky Way was the only galaxy in existence. It was not until 1925 that Edwin Hubble, building upon the work of Henrietta Leavitt and Ejnar Hertzsprung, proved that the Andromeda Galaxy must lie beyond the Milky Way, and humanity began to recognize the sheer scope of the Universe.

Provider: NOIRLab

Image Source: https://noirlab.edu/public/images/iotw2110a/

Curator: NSF's NOIRLab, Tucson, AZ, USA

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
LCRS B041803.7-391607
Noirlab_iotw2110a_128
 

Position Details

Position (ICRS)
RA = 4h 19m 55.2s
DEC = -39° 11’ 9.7”
Orientation
North is 0.2° CW
Field of View
11.6 x 7.5 arcminutes
Constellation
Eridanus

Color Mapping

  Telescope Spectral Band Wavelength
Red Vctor M. Blanco 4-meter Telescope (DECam) Optical (I) 785.0 nm
Green Vctor M. Blanco 4-meter Telescope (DECam) Optical (R) 644.0 nm
Blue Vctor M. Blanco 4-meter Telescope (DECam) Optical (G) 474.0 nm
Spectrum_base
Red
Green
Blue
Noirlab_iotw2110a_1280
×
ID
iotw2110a
Subject Category
Subject Name
LCRS B041803.7-391607
Credits
CTIO/NOIRLab/DOE/NSF/AURAImage processing: Travis Rector (University of Alaska, Anchorage/NSF's NOIRLab), Jen Miller (Gemini Observatory/NSF's NOIRLab), Mahdi Zamani & Davide de Martin (NSF's NOIRLab)
Release Date
2021-03-10T13:26:03
Lightyears
Redshift
Reference Url
https://noirlab.edu/public/images/iotw2110a/
Type
Observation
Image Quality
Distance Notes
Facility
Vctor M. Blanco 4-meter Telescope, Vctor M. Blanco 4-meter Telescope, Vctor M. Blanco 4-meter Telescope
Instrument
DECam, DECam, DECam
Color Assignment
Red, Green, Blue
Band
Optical, Optical, Optical
Bandpass
I, R, G
Central Wavelength
785, 644, 474
Start Time
Integration Time
Dataset ID
None, None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
64.9798295308, -39.1860220264
Reference Dimension
4000.0, 2576.0
Reference Pixel
2000.2, 1288.1288
Scale
-4.83974045754e-05, 4.83974045754e-05
Rotation
-0.24
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
NSF's NOIRLab
URL
https://noirlab.edu
Name
Email
Telephone
Address
950 North Cherry Ave.
City
Tucson
State/Province
AZ
Postal Code
85719
Country
USA
Rights
Creative Commons Attribution 4.0 International License
Publisher
NSF's NOIRLab
Publisher ID
noirlab
Resource ID
iotw2110a
Metadata Date
2021-04-20T05:27:20.866038
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.