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HST Images of Supernova Host Galaxies

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#1 Dave Mitsky

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Posted 21 May 2022 - 06:18 PM

Spanning from 2003 to 2021, this collection of images from the NASA/ESA Hubble Space Telescope features galaxies that are all hosts to both Cepheid variables and supernovae. These two celestial phenomena are both crucial tools used by astronomers to determine astronomical distance, and have been used to refine our measurement of Hubble's constant, the expansion rate of the universe
 

Each of the images in this special collection features a spiral galaxy that hosts both Cepheid variables and a special class of supernovae, two remarkable stellar phenomena that on the face of it do not have much in common: Cepheid variables are pulsating stars that regularly brighten and dim and type Ia supernovae are the catastrophic explosions that mark the death throes of a hot, dense white dwarf star. However, both can be used by astronomers to measure the distance to an astronomical object.

 

https://phys.org/new...t-galaxies.html


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#2 Dave Mitsky

Dave Mitsky

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Posted 21 May 2022 - 06:22 PM

The NASA news release about this image can be seen at https://hubblesite.o...2-005?news=true


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#3 Johnnycarter22

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Posted 21 May 2022 - 07:11 PM

I had seen this article the other day but did not have time to read it then, thanx for the link.  Can’t wait for the James Webb to get started, soon now.




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