Scientists are still constantly finding new, interesting aspects of our own galaxy as well as other parts of the universe. It is up to NASA and other space agencies to push for exploration to other areas of space so we can learn more about our own existence. For the good of the future, it is important to continue to learn more through space exploration.
We will never be able to know all there is to know about the universe in which we live. NASA can still continue to learn and discover with space exploration. If NASA stops all space exploration, we will never know what lies just beyond our view. Space cameras have detected planets similar to our own that could possible harbor life; without space exploration, we'll never know for sure.
NASA, and other global space agencies, have only scratched the surface of space exploration within our immediate solar system. A great deal more needs to be learned regarding our solar system, let alone the Milky Way galaxy and the vast expanse of space beyond. Some scientists argue that our survival as a species depends upon our continuing our exploration of our solar system, our galaxy and beyond.
Although it seems NASA has made strides in space exploration, it has managed to explore only a very minute part of it. The universe is infinite and expanding. It still contains many mysteries that scientists are only just beginning to understand. Even elements of space that everyone recognizes, such as comets, asteroids and black holes are still largely understood by scientists.