What is the approximate orbital period of the Sun around the Galactic Center in million years?

The Sun takes approximately 250 million years to orbit the center of the Milky Way. This immense interval is often called a galactic year or cosmic year; modern estimates commonly place it in a range of roughly 220–250 million years, making the stored approximation defensible.

The Sun and the entire Solar System orbit the Galactic Center at an average speed of about 230 kilometers per second. Although that sounds extraordinarily fast, the orbit’s scale is vast: the Sun lies roughly 26,000–28,000 light-years from the Milky Way’s center, where the supermassive black hole Sagittarius A* resides.

A galactic year is not perfectly comparable to an Earth year in every detail because the Sun’s path is not an exact circle and the Milky Way’s mass distribution is complex. During its galactic orbit, the Sun also moves above and below the Galaxy’s disk. Since the Sun formed about 4.6 billion years ago, it has completed roughly 20 galactic revolutions.