Snakes and Stones

Esahubble_potw1939a_1024

esahubble_potw1939a September 30th, 2019

Credit: ESA/Hubble & NASA, A. Adamo

The galaxy pictured in this Hubble Picture of the Week has an especially evocative name: the Medusa merger. Often referred to by its somewhat drier New General Catalogue designation of NGC 4194, this was not always one entity, but two. An early galaxy consumed a smaller gas-rich system, throwing out streams of stars and dust out into space. These streams, seen rising from the top of the merger galaxy, resembles the writhing snakes that Medusa, a monster in ancient Greek mythology, famously had on her head in place of hair, lending the object its intriguing name. The legend of Medusa also held that anyone who saw her face would transform into stone. In this case, you can feast your eyes without fear on the centre of the merging galaxies, a region known as Medusa's eye. All the cool gas pooling here has triggered a burst of star formation, causing it to stand out brightly against the dark cosmic backdrop. The Medusa merger is located about 130 million light-years away in the constellation of Ursa Major (The Great Bear).

Provider: Hubble Space Telescope | ESA

Image Source: https://esahubble.org/images/potw1939a/

Curator: ESA/Hubble, Garching bei München, None, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
NGC 4194
Subject - Distant Universe
Galaxy > Type > Interacting
Esahubble_potw1939a_128
 

Position Details

Position (ICRS)
RA = 12h 14m 10.2s
DEC = 54° 31’ 55.0”
Orientation
North is 134.6° CW
Field of View
1.6 x 1.4 arcminutes
Constellation
Ursa Major

Color Mapping

  Telescope Spectral Band Wavelength
Red Hubble (WFC3) Optical (H + [N II]) 665.0 nm
Green Hubble (WFC3) Optical (B) 438.0 nm
Yellow Hubble (WFC3) Optical (V) 555.0 nm
Green Hubble (WFC3) Optical (u) 336.0 nm
Green Hubble (WFC3) Optical (V) 555.0 nm
Cyan Hubble (WFC3) Optical (B) 438.0 nm
Blue Hubble (WFC3) Optical (u) 336.0 nm
Spectrum_base
Red
Green
Yellow
Green
Green
Cyan
Blue
Esahubble_potw1939a_1280
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ID
potw1939a
Subject Category
D.5.1.7  
Subject Name
NGC 4194
Credits
ESA/Hubble & NASA, A. Adamo
Release Date
2019-09-30T06:00:00
Lightyears
Redshift
Reference Url
https://esahubble.org/images/potw1939a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
WFC3, WFC3, WFC3, WFC3, WFC3, WFC3, WFC3
Color Assignment
Red, Green, Yellow, Green, Green, Cyan, Blue
Band
Optical, Optical, Optical, Optical, Optical, Optical, Optical
Bandpass
H + [N II], B, V, u, V, B, u
Central Wavelength
665, 438, 555, 336, 555, 438, 336
Start Time
Integration Time
Dataset ID
None, None, None, None, None, None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
183.542661379, 54.5319512519
Reference Dimension
2460.0, 2131.0
Reference Pixel
1230.0, 1065.5
Scale
-1.10016973027e-05, 1.10016973027e-05
Rotation
-134.63999999999993
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
None
Postal Code
D-85748
Country
Germany
Rights
Creative Commons Attribution 4.0 International License
Publisher
ESA/Hubble
Publisher ID
esahubble
Resource ID
potw1939a
Metadata Date
2019-09-18T10:11:43+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.