More than meets the eye

Esahubble_potw1738a_500

esahubble_potw1738a September 18th, 2017

Credit: ESA/Hubble & NASAAcknowledgement: Judy Schmidt  

Despite the advances made in past decades, the process of galaxy formation remains an open question in astronomy. Various theories have been suggested, but since galaxies come in all shapes and sizes including elliptical, spiral, and irregular no single theory has so far been able to satisfactorily explain the origins of all the galaxies we see throughout the Universe. To determine which formation model is correct (if any), astronomers hunt for the telltale signs of various physical processes. One example of this is galactic coronas, which are huge, invisible regions of hot gas that surround a galaxys visible bulk, forming a spheroidal shape. They are so hot that they can be detected by their X-ray emission, far beyond the optical radius of the galaxy. Because they are so wispy, these coronas are extremely difficult to detect. In 2013, astronomers highlighted NGC 6753, imaged here by the NASA/ESA Hubble Space Telescope, as one of only two known spiral galaxies that were both massive enough and close enough to permit detailed observations of their coronas. Of course, NGC 6753 is only close in astronomical terms the galaxy is nearly 150 million light-years from Earth. NGC 6753 is a whirl of colour in this image the bursts of blue throughout the spiral arms are regions filled with young stars glowing brightly in ultraviolet light, while redder areas are filled with older stars emitting in the cooler near-infrared.

Image Source: https://www.spacetelescope.org/images/potw1738a/

Curator: ESA/Hubble, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
NGC 6753
Subject - Local Universe
Galaxy » Type » Spiral
Esahubble_potw1738a_128
 

Position Details

Position (ICRS)
RA = 19h 11m 23.7s
DEC = -57° 2’ 52.3”
Orientation
North is 18.8° CW
Field of View
1.8 x 1.8 arcminutes
Constellation
Pavo

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_blue Hubble Space Telescope (WFPC2) Optical (U) 300.0 nm
Arrow_left_green Hubble Space Telescope (WFPC2) Optical (U) 300.0 nm
Arrow_left_green Hubble Space Telescope (WFPC2) Optical (I) 814.0 nm
Arrow_left_red Hubble Space Telescope (WFPC2) Optical (I) 814.0 nm
Spectrum_base
Arrow_top_blue
Arrow_top_green
Arrow_top_green
Arrow_top_red
Esahubble_potw1738a_1280
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ID
potw1738a
Subject Category
C.5.1.1  
Subject Name
NGC 6753
Credits
ESA/Hubble & NASAAcknowledgement: Judy Schmidt  
Lightyears
Redshift
Reference Url
https://www.spacetelescope.org/images/potw1738a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
WFPC2, WFPC2, WFPC2, WFPC2
Color Assignment
Blue, Green, Green, Red
Band
Optical, Optical, Optical, Optical
Bandpass
U, U, I, I
Central Wavelength
300, 300, 814, 814
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
287.848705885, -57.047858744
Reference Dimension
1103.0, 1101.0
Reference Pixel
551.5, 550.5
Scale
-2.7765735253e-05, 2.7765735253e-05
Rotation
-18.84
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
potw1738a
Metadata Date
2017-06-09T14:02:26+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.