An object is an isotropic light emitting source and the object moves very near the speed of light c. I am an observer on a planet without an atmosphere and I see the path of the object as a line that is perpendicular to the normal from the planet's surface where I am standing. Now take a line segment of that objects path that is the same length on each side of the intersection point with the normal and call it AB. I am at point C and lets say points ABC make an equalaterial triangle. If at point A, a light pulse is emitted from the object and it is traveling at c, along which direction will I observe the beam? Will it be along the direction AC or along some other direction. [Broken] I am thinking that the pulse emitted at A will reach C almost along the line BC. Does this make sense within the framework of Relativity? If so what is this phenomenon called? Has it been experimentally verfied and what are the experiments? Thanks.