Simplify the following text for a Grade 12 native English-speaking person.
Original: For specific types of orbits , words such as `` perihelion '' ( for Sun-centered orbits ) , `` perigee '' ( for Earth-centered orbits ) , `` periastron '' ( for orbits around stars ) and so on may replace the word `` periapsis '' .
Simplified: ( For specific types of orbits , words such as `` perihelion '' ( for Sun-centered orbits ) , `` perigee '' ( for Earth-centered orbits ) , `` pericenter '' ( general ) , etc. may replace the word `` periapsis '' .