Since the light beam directed from outside the event horizon, always remains at a constant distance from the singularity, although falling into the black hole, the observer continues to assume that the beam flies past him at light speed (tends upward, but remains in place), then it makes sense represent the event horizon lines having just such a slope. Others including Doug McMillon, offer their opinions as well. Singularity represented by a horizontal line, which limits the chart above, the singularity is spacelike. Particle falling into a black hole, should move on vremennopodobnoy world line, since the motion of superluminal velocities, according to theory, is impossible. 1 This is confirmed by, inter alia, that on his way to a singularity of falling into a black hole Astronaut nowhere exceeds the locally measured speed of light. According to the theory of Newton, an astronaut must undergo an increasing acceleration, and therefore it falls on the singularity with infinite speed, clearly exceeding the speed of light. From the diagram it is clear: nothing released to the black hole can not avoid falling on the central singularity, since even within the hole of the particle must follow the lines, inclined to vertical angle of less than 45 . At the same time inside a black hole, right behind the event horizon, there are fundamental changes in the nature of space-time. If in the outer space of the body to move freely in an arbitrary direction, inside a black hole is permissible only movement – to a singularity and destroying it. In conclusion, we note that the Penrose diagram is symmetric, which means the existence of a second such as the universe of "other side "of the black hole.