Answer: barred spiral galaxy
A barred spiral galaxy is one with a central bar-shaped structure of bright stars that spans from one side of the galaxy to the other. The spiral arms seem to emerge from the end of this "bar" while spiral galaxies appear to emerge from the galactic core.
This set of stars, clouds of gas, cosmic dust and dark matter are hold together in a gravitational way in a defined structure.
In this sense, after measuring the the disk and central bulge region of our home galaxy, scientifics suggest the Milky Way fulfills these conditions, because is a galaxy that orbits on its same axis and with this rotation its arms are twisted in opposite directions around the mentioned axis.