How does other galaxies differ from out own?

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SUMMARY

Galaxies differ significantly from one another in shape, size, star count, location, and their interactions with other galaxies. Measurement techniques such as Doppler shift are utilized to determine the size and distance of galaxies, with angular size measurements providing actual dimensions. The discussion highlights the ongoing debate regarding the smallest known galaxy, emphasizing the complexity of galactic comparisons.

PREREQUISITES
  • Doppler shift measurement techniques
  • Angular size measurement methods
  • Understanding of galaxy morphology
  • Familiarity with astronomical distance scales
NEXT STEPS
  • Research the smallest known galaxies and their characteristics
  • Learn about advanced Doppler shift applications in astronomy
  • Explore methods for measuring angular size in astrophysics
  • Investigate the interactions between different types of galaxies
USEFUL FOR

Astronomers, astrophysics students, and anyone interested in comparative galaxy studies will benefit from this discussion.

MightyMeanie
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How does other galaxies differ from out own?
 
Astronomy news on Phys.org
shape, size, starcount, location, interaction with other galaxies
 
How does one telephone differ from another? One car from another? It's the same kind of thing, if I'm not mistaken.
 
They differ in almost every aspect possible.

BJ
 
Is there a way to measure how big or small a galaxy is compared to ours? What is the smallest galaxy we know of?
 
misskitty said:
Is there a way to measure how big or small a galaxy is compared to ours?
With the caveat that there is still a little debate about it, using doppler shift to find distance (there are other ways for closer galaxies) and measuring the angular size will give the actual size.
 

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