Outer space holds the answers to the unknown. The uncertainty is what drives us in the quest for knowledge. Archaeology of the planets is key to the path of discovery of other life. Space is the final frontier with secrets left to uncover ,so very little is known about the deep ocean also.
While it may not include digging up the remains of a complex society, space archaeology is something that we will likely use to learn more about our solar system and others. If there were once organisms living on planets as scientist believe is possible for places such as Mars we would learn about those through space archaeology.
Many people are now looking seriously at the idea of colonies on Mars, or even the Moon. It is not too far fetched to be thinking that one day, some scientists could look back on those early colonies the same way which we study the Romans and the Mayans today.
Space exploration is exciting, new and grand, but how can we focus on things outside of our atmosphere when we haven't even mastered the boring ol' Earth we live on? There are still places in Antarctica that scientists have yet to survey and explore and indigenous cultures anthropologists have yet to study in the unventured jungles of the Amazon. There are an unaccounted number natural mysteries science has yet to explain, it seems as if we have barely scratched the surface. So how can we even think about building a future in space when we don't even really understand what already surrounds us?