I want to ask some questions about this sentence.

Question

In addition to conventional galaxies, the universe contains very dim galaxies that until recently went unnoticed by astronomers. Possibly as numerous as conventional galaxies, these galaxies have the same general shape and even the same approximate number of stars as a common type of conventional galaxy, the spiral, but tend to be much larger.

I want to ask:
1."as a common type of conventional galaxy" modifies what? 
2."the spiral" modifies what?

Abhi077 · Answer

In the above sentence, 'common type of conventional galaxy' is modifying 'the spiral'

YUGIspiral · Answer

but "as a common type of conventional galaxy" close to "stars".
how can I figure out it?

ARIEN3228 · Answer

In addition to conventional galaxies,  the universe contains very dim galaxies that until recently went unnoticed by astronomers . Possibly as numerous as conventional galaxies,  these galaxies  have the same general shape and even the same approximate number of stars as a common type of conventional galaxy, the spiral, but tend to be much larger.

Focus on the text in bold.

1."as a common type of conventional galaxy" modifies what? 
2."the spiral" modifies what? Spiral gives additional information about conventional galaxy.

these galaxies refer to the very dim galaxies,which but tend to be much larger.

d999 · Answer

1)   it's comparing number of stars in the common type of conventional galaxy with that in the dim galaxy.  
2.  modifies conventional galaxy.

I want to ask some questions about this sentence.

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