25 Oct 1999 h. 12:16. At a larger scale, we observe here the activity of SWV of BN. In this moment it ejects, with discrete explosions, incandescent material mixed with dark ash, that creates a nice chromatic contrast with the white of the vapour in the background. A spherical symmetry is rarely observed. Most of the times the high velocity of the gas emission produces more vertically elongated shapes. 1.7 MB