sentences:  During the Apollo program, the terms "pericynthion" and "apocynthion" were used when referring to orbiting the Moon; they reference Cynthia, an alternative name for the Greek Moon goddess Artemis.Regarding black holes, the terms "perimelasma" and "apomelasma" (from a Greek root) were used by physicist and science-fiction author Geoffrey A. Landis in a 1998 story; which occurred before "perinigricon" and "aponigricon" (from Latin) appeared in the scientific literature in 2002, and before "peribothron" (from Greek "bothros", meaning hole or pit) in 2015.The suffixes shown below may be added to prefixes "peri-" or "apo-" to form unique names of apsides for the orbiting bodies of the indicated host/(primary) system.