The same is true of all other worlds.

We are at this moment surrounded by these worlds of finer matter, as close to us as the world we see, and their inhabitants are passing through us and about us, but we are entirely unconscious of them.
Since our evolution is centred at present upon this globe which we call the earth, it is in connection with it only that we shall be speaking of these higher worlds, so in future when I use the term "astral world" I shall mean by it the astral part of our own globe only, and not (as heretofore) the astral part of the whole solar system.

This astral part of our own world is also a globe, but of astral matter.

It occupies the same place as the globe which we see, but its matter (being so much lighter) extends out into space on all sides of us further than does the atmosphere of the earth--a great deal further.

It stretches to a little less than the mean distance of the moon, so that though the two physical globes, the earth and the moon, are nearly 240,000 miles apart, the astral globes of these two bodies touch one another when the moon is in perigee, but not when she is in apogee.