In about 4 billion years, to be exactly. And either nothing happens at all and both galaxies just pass through each other or both galaxies destroy each other, depending on who is right. If there actually is a black megahole in the center of each galaxy, they could destroy each other or form a new, bigger galaxy.
In about 4 billion years, to be exactly. And either nothing happens at all and both galaxies just pass through each other or both galaxies destroy each other, depending on who is right. If there actually is a black megahole in the center of each galaxy, they could destroy each other or form a new, bigger galaxy.