X-ray image of the NGC 2300 group of galaxies

Esahubble_opo9305a_1024

esahubble_opo9305a January 4th, 1993

Credit: NASA

ROSAT's X-ray picture of a small cluster of galaxies known as the NGC 2300 group. The cluster lies 150 million light years from Earth in the direction of the northern constellation Cepheus. Taken with the Position Sensitive Proportional Counter instrument during in April 1992, the image shows that the small group of galaxies is immersed in a huge cloud of hot gas (in purple) about 1.3 million light-years in diameter. The ROSAT observation implies that most of the mysterious "dark matter" is concentrated in and around small groups of galaxies. The clue to the presence of dark matter is the fact that the hot cloud should have dissipated into space long ago unless it was held together by the gravity of an immense mass.

Provider: Hubble Space Telescope | ESA

Image Source: https://www.spacetelescope.org/images/opo9305a/

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
Blue Galaxy
Subject - Local Universe
Galaxy > Grouping > Cluster
Esahubble_opo9305a_128
 

Position Details

Position (ICRS)
RA = 7h 30m 39.5s
DEC = 85° 40’ 59.0”
Orientation
North is 6.3° CCW
Field of View
16.2 x 19.3 arcminutes
Constellation
Cepheus

Color Mapping

  Telescope Spectral Band Wavelength
Grayscale DSS (Other) Optical (None) -
Purple ROSAT (PSPC) X-ray (None) -
Esahubble_opo9305a_1280
×
ID
opo9305a
Subject Category
C.5.5.3  
Subject Name
Blue Galaxy
Credits
NASA
Release Date
1993-01-04T06:00:00
Lightyears
Redshift
Reference Url
https://www.spacetelescope.org/images/opo9305a/
Type
Observation
Image Quality
Distance Notes
Facility
DSS, ROSAT
Instrument
Other, PSPC
Color Assignment
Grayscale, Purple
Band
Optical, X-ray
Bandpass
None, None
Central Wavelength
Start Time
Integration Time
Dataset ID
None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
112.664761077, 85.6830680942
Reference Dimension
285.0, 340.0
Reference Pixel
142.5, 170.0
Scale
-0.000945440597499, 0.000945440597499
Rotation
6.2599999999999882
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
opo9305a
Metadata Date
2003-12-09T17:38:32+01:00
Metadata Version
1.1
×

 

Detailed color mapping information coming soon...

×

There is no distance meta data in this image.

 

Providers | Sign In