A Waterfall of Stars

Esahubble_potw2044a_1024

esahubble_potw2044a November 2nd, 2020

Credit: ESA/Hubble & NASA, R. TullyAcknowledgement: Gagandeep Anand

The galaxy UGCA 193, seen here by the NASA/ESA Hubble Space Telescope, is a galaxy in the constellation of Sextans (The Sextant). Looking rather like a waterfall, UGCA 193 appears to host many young stars, especially in its lower portion, creating a striking blue haze and the sense that the stars are falling from above. The blue colour of UGCA 193 indicates the stars that we see are hot some with temperatures exceeding 6 times that of our Sun. We know that cooler stars appear to our eyes more red, and hotter stars appear more blue. As the mass and surface temperature of a star, and therefore its colour, are linked, heavier stars are able to burn at higher temperatures resulting in a blue glow from their surface.

Provider: Hubble Space Telescope | ESA

Image Source: https://www.spacetelescope.org/images/potw2044a/

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
UGCA 193
Subject - Local Universe
Galaxy > Type > Spiral
Esahubble_potw2044a_128
 

Position Details

Position (ICRS)
RA = 10h 2m 35.8s
DEC = -6° 1’ 3.1”
Orientation
North is 1.7° CW
Field of View
3.2 x 3.3 arcminutes
Constellation
Sextans

Color Mapping

  Telescope Spectral Band Wavelength
Blue Hubble (ACS) Optical (V) 606.0 nm
Green Hubble (ACS) Optical (V) 606.0 nm
Green Hubble (ACS) Optical (I) 814.0 nm
Red Hubble (ACS) Optical (I) 814.0 nm
Spectrum_base
Blue
Green
Green
Red
Esahubble_potw2044a_1280
×
ID
potw2044a
Subject Category
C.5.1.1  
Subject Name
UGCA 193
Credits
ESA/Hubble & NASA, R. TullyAcknowledgement: Gagandeep Anand
Release Date
2020-11-02T06:00:00
Lightyears
Redshift
Reference Url
https://www.spacetelescope.org/images/potw2044a/
Type
Observation
Image Quality
Distance Notes
NED
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
None, None, None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
150.649228644, -6.01751737505
Reference Dimension
6462.0, 6616.0
Reference Pixel
3231.0, 3308.0
Scale
-8.32735007557e-06, 8.32735007557e-06
Rotation
-1.719999999999986
Coordinate System Projection:
TAN
Quality
Full
FITS Header
SIMPLE = T / conforms to FITS standard BITPIX = -32 / array data type NAXIS = 2 / number of array dimensions NAXIS1 = 7038 NAXIS2 = 7168 CTYPE1 = 'RA---TAN' CTYPE2 = 'DEC--TAN' EQUINOX = 2000 CRVAL1 = 150.649807176 CRVAL2 = -6.017373820 CRPIX1 = 3519.5000 CRPIX2 = 3584.5000 CDELT1 = -0.000008333 CDELT2 = 0.000008333 CROTA2 = 358.323411888 END
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
potw2044a
Metadata Date
2020-10-28T15:33:48.141295
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.