Other stars are at least a thousand times as far as distant planets, but other galaxies are only about 4 or so galaxy-widths away on average. So if distant interstellar travel is possible, then intergalactic travel is just a hard trip away. The problem is that statement continges on a very large “if”.
Galaxies are closer together relative to their size than stars; but they’re still a few orders of magnitude farther apart than this.
The scale I’ve seen is: If the sun were the size of a ping pong ball, the next nearest star would be hundreds of miles away. But if the Milky Way were the size of a CD, Andromeda would be on the other side of the room.
Other stars are at least a thousand times as far as distant planets, but other galaxies are only about 4 or so galaxy-widths away on average. So if distant interstellar travel is possible, then intergalactic travel is just a hard trip away. The problem is that statement continges on a very large “if”.
Galaxies are closer together relative to their size than stars; but they’re still a few orders of magnitude farther apart than this.
The scale I’ve seen is: If the sun were the size of a ping pong ball, the next nearest star would be hundreds of miles away. But if the Milky Way were the size of a CD, Andromeda would be on the other side of the room.