... Simulation: A Disk Galaxy Forms . ... U. Washington ), N-Body Shop , NASA Advanced Supercomputing Explanation: How do galaxies like our Milky Way form? ... For our Milky Way Galaxy , however, big mergers may not be over -- recent evidence indicates that our large spiral disk Galaxy will collide and coalesce with the slightly larger Andromeda spiral disk galaxy in the next few billion years. ... NASA Official: Jay Norris. ... Publications with keywords: galaxy formation - spiral galaxy - Milky Way . ...