The recent study you are referring to is a 2023 study published in the journal
The study used data from the Hubble Space Telescope to
study the shapes of galaxies in the nearby universe.
The study found that 70% of galaxies are elliptical, 20% are spiral, and 10% are irregular.
Spiral galaxies are the most common type of galaxy.
They are characterized by a central bulge of stars surrounded by a disk of stars.
The disk of stars is further subdivided into spiral arms.
The spiral arms are regions of active star formation.
This is because the spiral arms contain a lot of gas and dust, which are the raw materials for stars.