This is the inaugural entry in what promises to be a very long, fun,
and educational series, where we examine individual
objects, systems of objects, or classes of objects in the solar system.
It is the environment in which our planet evolved, the backdrop for
humanity's future development, and exquisitely beautiful, diverse, and
exotic besides. We begin the series with our star, known typically as
The Sun but occasionally personalized as Sol (hence, "solar").
The Sun is currently in a Galactic "suburb" called the Orion Spur - a small, short arc of stars and nebulae extending between the major spiral arm Perseus and the minor arm Carina-Saggitarius.
However, it was not always part of the Orion Spur, and its current association with it is not permanent. Stars in a spiral galaxy like the Milky Way orbit the galactic core more or less independently of each other, so arm structure and its stellar membership are transient. But barring a radically close encounter with another star under conditions that would slingshot it into another galactic orbit, the Sun's path will stay roughly where it is relative to the center of the galaxy. On the other hand, the probability of such an event increases substantially in 3-5 billion years if the theorized collision of Andromeda and the Milky Way occurs.
