A period may pertain-to an orbit.Logical formLearned from62 sentences. Orbit can be around the moon.Logical formLearned from61 sentences. A male can be in orbit.Logical formLearned from59 sentences. Orbit can be around a star.Logical formLearned from58 sentences. Astronauts can be in orbit.Logical formLearned from57 sentences. A spacecraft can be in orbit.Logical formLearned from57 sentences. An orbit can be egg-shaped.Logical formLearned from57 sentences. An orbit may decay.Logical formLearned from55 sentences. An orbit can be permanent.Logical formLearned from55 sentences. Orbits can be stellar.Logical formLearned from55 sentences. A spacecraft may enter orbit.Logical formLearned from54 sentences. Orbits may pertain-to planets.Logical formLearned from53 sentences. An object can be in orbit.Logical formLearned from53 sentences. A spacecraft can be in orbit.Logical formLearned from52 sentences. An orbit can be binary.Logical formLearned from52 sentences.