Comet partner
Also: comet
A partner whose presence in your life is periodic — geographically distant, occasionally visiting, intermittently in close orbit and otherwise far away.
A comet partner is one whose connection to you is real and meaningful but operates on a long cycle. They live in another city or country; you see them a few times a year; in between you may speak often or rarely, but they are not part of your daily life. The astronomy metaphor is intentional: their orbit brings them close periodically, then takes them far away again, with the connection persisting across the gap.
Comet relationships are common in polyamory in part because polyamory makes them more practical than monogamous norms typically allow. A relationship that exists across distance and time without expectation of closing the distance is hard to sustain in a monogamous frame; in a polyamorous frame, the comet relationship can exist alongside more locally-entwined ones without competing for the same role.
The depth of a comet relationship varies. Some comet partners are deeply intimate — long correspondence, planned reunions, shared internal life despite physical distance. Others are lighter — sustained affection without the depth of a daily relationship. What they share is the cyclical pattern: presence, absence, presence, absence, sustained across years.
Practical considerations include managing the intensity of reunion windows (a comet visit often compresses months of relationship into a few days, which can produce its own NRE-like effects), and avoiding the slow drift where the gaps lengthen and the relationship quietly fades without anyone naming it. Many comet partnerships have explicit check-in rhythms specifically to keep them from drifting.