It’s a view of the sun, moving away at light speed in real time. It gives a realistic perspective on just how vast our solar system is.
You might be able to wait the two minutes of nothing to get to Mercury, just to get a feel for the big empty. After that, just jump ahead in the video to the next planetary approach. There’s a countdown timer to the right, so you can ballpark it.
[Riding Light – Traversing the Solar System at the speed of light] (Viewer #18,683)

Ok, that’s the first time I ever traveled at light speed and thought to myself, “Are we there yet?”