Mapping the nearby Universe

Esahubble_potw1739a_500

esahubble_potw1739a September 25th, 2017

Credit: ESA/Hubble & NASA

The distances to objects in the Universe can differ enormously. The nearest star to us Proxima Centauri lies some 4.2 light-years from us, while some incredibly distant galaxies are so far away 13 billion light-years or more that they are only visible to us as a result of cosmic tricks of magnification. The subject of this image, a galaxy called ESO 376-16, sits nearly 23 million light-years from Earth not that great a distance on a cosmic scale. However, given the galaxys relative proximity to us, we know surprisingly little about it. Astronomers are still debating about many of the properties of ESO 376-16, including its morphology. Galaxies are divided into types based on their visual appearance and characteristics; spiral galaxies, like the Milky Way, are flattened discs with curved arms sweeping out from a central nucleus, while irregular galaxies lack a distinct structure and look far more chaotic. On the basis of its rather ill-defined morphology, ESO 376-16 is thought to be either a late-type spiral or a dwarf irregular galaxy. Despite its mystique, observations of ESO 376-16 have been useful in several studies, including one made with the NASA/ESA Hubble Space Telescope that aimed to create a 3D map of galaxies lying in the vicinity of Earth. Researchers used Hubble to gauge the distance to galaxies including ESO 376-16 by measuring the luminosities of especially bright red-giant-branch stars sitting within the galaxies. They then used their data to generate and calibrate 3D maps of the distribution of galaxies throughout the nearby cosmos.

Image Source: https://www.spacetelescope.org/images/potw1739a/

Curator: ESA/Hubble, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
ESO 376-16
Subject - Local Universe
Galaxy
Esahubble_potw1739a_128
 

Position Details

Position (ICRS)
RA = 10h 43m 26.7s
DEC = -37° 2’ 10.9”
Orientation
North is 164.8° CW
Field of View
3.3 x 2.3 arcminutes
Constellation
Antlia

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_blue Hubble Space Telescope (ACS) Optical (V) 606.0 nm
Arrow_left_green Hubble Space Telescope (ACS) Optical (V) 606.0 nm
Arrow_left_green Hubble Space Telescope (ACS) Optical (I) 814.0 nm
Arrow_left_red Hubble Space Telescope (ACS) Optical (I) 814.0 nm
Spectrum_base
Arrow_top_blue
Arrow_top_green
Arrow_top_green
Arrow_top_red
Esahubble_potw1739a_1280
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ID
potw1739a
Subject Category
C.5  
Subject Name
ESO 376-16
Credits
ESA/Hubble & NASA
Lightyears
Redshift
Reference Url
https://www.spacetelescope.org/images/potw1739a/
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
Blue, Green, Green, Red
Band
Optical, Optical, Optical, Optical
Bandpass
V, V, I, I
Central Wavelength
606, 606, 814, 814
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
160.861172822, -37.0363717336
Reference Dimension
3961.0, 2739.0
Reference Pixel
1980.5, 1369.5
Scale
-1.38743638377e-05, 1.38743638377e-05
Rotation
-164.7600000000001
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
potw1739a
Metadata Date
2017-01-24T16:34:35+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.