Galaxy on Earth

 into the thin edge.
 
When we observe a galaxy edge-on, such as the Sculptor Galaxy or the Needle Galaxy, we glimpse the delicate balance of dust, stars, and dark matter that form its thin, disk-like structure. This unique viewpoint allows astronomers to study its rotation and measure the effects of dark matter—an invisible force that holds galaxies together, yet remains one of the biggest mysteries in modern astrophysics.