E meaning in Space Science ?

Exploration is the act of searching for the purpose of discovery of information or resources, especially in the context of geography or space, rather than research and development that is usually not centred on earth sciences or astronomy. Exploration occurs in all non-sessile animal species, including humans. In human history, its most dramatic rise was during the Age of Discovery when European explorers sailed and charted much of the rest of the world for a variety of reasons. Since then, major explorations after the Age of Discovery have occurred for reasons mostly aimed at information discovery.