Assertion: andromeda galaxy's structure | /r/HasProperty | this type of star
Facets:
Source sentences:
text: Because of this technique, the astronomers were able to detect a very significant over-density of class M giant stars in a part of the sky occupied by the Canis Major constellation, along with several other related structures composed of this type of star, two of which form broad, faint arcs (as seen in the image close to the top).