In astronomy, for every two objects in space in orbit, there exists a period of time in which both objects are at their closest they will ever be in orbit. This is known as their "periapsis". In any relationship you have with someone, there exists a periapsis. For example, the periapsis with you and a stranger in an airport is bright and brief, whereas in a deep friendship, there is a period where circumstances will bring you the closest, and while the relationship is still strong, it will not be as close at it was then.
Sometimes, some orbits are so particularly strong that they can pull and change the direction of the orbit of the other planetary object. But regardless, every orbit, relationship. all have their periapsides (pl.).
We tend to think of landscapes as affecting us most strongly when we are in them or on them, when they offer us the primary sensations of touch and sight. But there are also the landscapes we bear with us in absentia, those places that live on in memory long after they have withdrawn in actuality, and such places―retreated to most often when we are most remote from them―are among the most important landscapes we possess.
| Robert Macfarlane
An ecological understanding allows us to identify "things"—rain, cloud, river—at the same time that it reminds us that these identities are fluid. Even mountains erode, and the ground below us moves in giant plates. It reminds us that—while it's useful to have a word for that thing called a cloud—when we really get down to it, all we can really point to is a series of flows and relationships that sometimes intersect and hold together long enough to be a "cloud."
Borders are everywhere and they are not only geographic; they are racial and sexual, epistemic and ontological, religious and aesthetic, linguistic and national. Borders are the interior routes of modernity/coloniality and the consequences of international law and global linear thinking.