I gazed into the sky at the right moment to see what I initially identified as a long white kite the shape of a boomerang/kite/wide chevron with a tight interior triangular edge and a wider/longer looser exterior edge gliding through the sky, then upon closer look I realized what I was seeing was a cloud or vapor or steam, like when hot meets cold and it was rolling from the sharpest point of the boomerang outward into wispy edges that dissipated as they rolled out. I stared hard trying to see an actual object but saw only stars and clouds behind the leading vapor creating the visual anomaly that had drawn my attention. I watched expecting it to be a weather phenomenon - expecting to see it dissipate entirely but to my surprise it shifted it's course, instead of being in a seemingly straight line as it had been since I first saw it, it gently tilted as if changing trajectory slightly more North away from West which it was heading. I took my eyes off it twice to convince someone nearby who was not able to locate it but i was able to locate it two more times after taking my eyes away from it and the sky. it was heading northwest then slightly corrected to north just over about 5 miles west of the strip and had a steady continuous pace at no point did it stop or hover, it was more of a steady slow gliding Very steady not erratic like a bird. I don't know depth/height so well enough to describe its height but the motion of movement being so steady was almost reminiscent of a blimp and the best analogy I could give for the height at which I saw it as well. It appeared to me as if something transparent was disturbing or creating cloud/steam/vapor that rolled off the point of an invisible object, the vapor it was either creating from heat/cold mixing or disturbing in the sky was the only thing I actually witnessed. I heard no sound that I perceived to be coming from it and saw no lights