I had this experience when I was walking on my house rooftop. As an experiment, I was basically transmitting my intentions to communicate with other beings together with some reiki symbols to connect. I did the process for around 15 mins and to my amazement a spherical orb appeared in the sky. The orb was quite and emitting a soothing continuous white light. I saw it in east direction slowly progressing towards west and then disappeared all of a sudden. I was very happy that my experiment worked so I decided to give it another shot just to confirm that the phenomenon was real. I took a break and after a while repeated the process. My intentions were again to communicate and confirm my previous sighting. This time the Orb showed up again briefly, but it wasn't moving and it was stationary. After a while it disintegrated.