The science which treats of the celestial bodies, of their magnitudes, motions, distances, periods of revolution, eclipses, constitution, physical condition, and of the causes of their various phenomena. A treatise on, or text-book of, the science. Hand in hand with Astronomy is the exploration of space. I remember seeing many of the launches and missions over the years, when man landed on the moon, etc.
Astronomy never gets boring.
There is just so much to see and experience. Astronomy is the study of the universe. It encompasses everything. There are so many things to observe and study that there isn't enough time in life to do it all. So even though the Universe is limitless, we sometimes have to impose our own limitations as to what we study.