A Ari-Sama New member Nov 23, 2010 #1 Every now and then I find these long cloud-like horizontal lines in the sky that I have no ideas what they are. Are they originally clouds or smoke or something else? What causes them?
Every now and then I find these long cloud-like horizontal lines in the sky that I have no ideas what they are. Are they originally clouds or smoke or something else? What causes them?
