Is the moon earths only natural satellite?

Answer 1

Yes.

Answer 2

Technically speaking, NO it is not. However it is generally given that distinction since we have no proof of any other stellar objects of earth origin. One might say there are many ultra small bits of earth out there especially if one agrees the moon to be a fragment of the earth from a past violent collision early in its life. So its easy to ASSUME other bit and pieces of earth are out there somewhere.

Answer 3

Natural Satellites:

Earth has one natural satellite. The Moon.

Quasi Satellites;

Quasi-satellites accompany Earth as it orbits the Sun but while located near Earth and affected by Earth's gravitational pull, they actually orbit the Sun and not Earth. Their orbits are unstable they appear and disappear over thousands of years. There are at least five such quasi-satellites, including Cruithne which was discovered in 1986 and has been called "Earth's second moon" though it is only 5 kilometers in size and does not actually orbit Earth. The designation of quasi-satellites is ambiguous and there may be more that have not been observed, so there is no fixed number.

In 2010 it was discovered that Earth posses at least Trojan asteroid that precedes Earth as it orbits the Sun. This asteroid exists in a stable gravitational fixed point known as a Lagrangian point. Trojan satellites had been previously seen associated with other planets in the solar system.

Answer 4

Yes.