Abstract: There are many unsolved problems associated with spiral galaxies. One of the biggest unsolved problems of is winding problem. This paper aims at solving the problem by introducing a new theory. It is named as "Rolling arms theory of spiral galaxies". It has been explained in detail, considering all the facts about the spiral galaxies. This theory is more appropriate than "standing wave theory". The paper also illustrates a possible reason for brief x-ray bursts found in many spiral galaxies.

Keywords: Spiral galaxy, stars, winding problem, new theory, rolling of arms, neutron stars.

| DOI: 10.17148/IARJSET.2021.8309