A survey of SN 1987A results in Science, Vol. 240, Page 754, offered additional perspective on the neutrino burst. The neutrino luminosity in the first second was 1053 erg/sec. Using consensus numbers for the density of luminous matter and the size of the observable universe, the luminosity of the entire universe is approximately 5×1052 erg/sec. Thus, during the explosion the supernova was brighter than the entire rest of the universe, yet generated all of its energy in a region about 50 km across. By comparison, if the Sun shines for another 10 billion years its total energy output over that entire period will be about 1051 erg. The supernova released 100 times that energy each second of the collapse.