This sounds like a riddle! The answer is likely the moon.

Here's why:

* Slow Movement: The moon appears to move across the sky at a much slower pace than the sun. This is because it's much farther away and orbits the Earth at a slower rate.

* Across the Sky: The moon's apparent path across the sky is noticeable over the course of hours and days.

Let me know if you'd like to try another riddle! 😊