The Moon

The Earth's Moon

The moon is the nearest extraterrestrial object to the earth and is obvious. Hence there has been natural curiousity about it for thousands of years.

The history of Lunar Exploration is one of excellent planning and strategy on the part of NASA. The chief Components of this process were the following missions:

Prior to actually retrieving lunar samples, little was known about the geological history of the Moon.

Theories for this history were based on examination of various photographics of the lunar surface. So let's take a look at our history of lunar exploration which have established the basic properties of the moon

From the retrieval of lunar rocks a fairly precise geological history of the moon has now been established. This history consists of the following events:

Altogether there were 6 landings on the moon. The first three (Apollo's 11,12,14) returned lunar samples that were extremely local to the landing site (no one wanted to wander too far away from the lander vehicle). The last three (Apollos 15,16,17) took a dune bugy with them and drove around the lunar surface in order to perform more extensive sampling.

From the analysis of returned lunar samples, the following sequence of events regarding the geological history of the moon have been determined:

The age dating of the lunar rocks have allowed us to identify four distinct periods in its geological history: