I love long exposures, and along with that Astral Photography.
Although the two use the same technique, it is applied to different subjects giving very different results.
With long exposures, many people feel like they are looking at time passing. A long exposure is taken over a period of time, so it makes sense that you would get that feeling when you look at those images.
With astrophotography, we photograph the night skies.
I was blown away by how much more of the stars the camera could capture than I could see with my eyes. In these images, it was the sensitivity of the camera to light that allowed for more of the stars to be exposed and show themselves.