Although the Moon is Earth's only natural satellite, there are a number of near-Earth objects (NEOs) with orbits that are in resonance with Earth. These have been called, inaccurately but provocatively, second, third or other moons of Earth. NEOs include quasi-satellites that orbit the Sun in resonance with Earth, which appear to orbit a point other than Earth itself, such as the orbital path of the NEO asteroid 3753 Cruithne.
Definition of CONVERGENCE. 1. : the act of converging and especially moving toward union or uniformity; especially: coordinated movement of the two eyes so that the image of a single point is formed on corresponding retinal areas.
For example, convergence of computing and telecommunications in modern telephony. Use convergence in a sentence. The worlds of tablet computing and smart-phone usage are moving closer and closer together, and tech experts predict a coming convergence between the two. The convergence of country music and blues from Black and White musicians in the early 1900's led to the creation of rock n' roll.