Here's why:
* No central "sun": Unlike our solar system, the Milky Way doesn't have a single star at its center. It's a spiral galaxy with billions of stars, including our own Sun.
* Different orbital periods: Stars within the Milky Way orbit its core at varying speeds and distances. This means their "years" (the time it takes to complete one orbit) are drastically different.
* No universal reference point: We don't have a universal point of reference in the Milky Way to define a "day" based on rotation.
Instead of a "day", we can talk about the Milky Way's rotation:
* The Milky Way Galaxy rotates, and it takes about 200 million years for our solar system to complete one orbit around its core.
So, in short, there's no set Earth-like day duration in the Milky Way. It's a vast and complex system with many different time scales.
