Greece travel for Weiss/Wikimedia Commons. A supernova is an even more massive nuclear stellar explosion. There are two distinct categories the irst type the binary-system supernova is essentially a large and very bright nova that entails the destruction of the white dwarf, while the second type consists of a huge star that, having consumed all of its own nuclear fuel, implodes, causing a massive explosion of light and resulting in the star’s disintegration. A supernova is a very rare phenomenon but, when one occurs, it is by far the brightest star in the sky. The light of a supernova may remain in the sky for months, indeed up to about two or three years. A binary-system supernova may be up to ,,, times brighter than the Sun assuming a vantage point the same distance from each during its peak. Examples of binary-system supernovas include SN in AD , which became much brighter in the sky than Venus reaching apparent magnitude and as large as half the Moon, and SN Kepler’s supernova in AD , which appeared as bright as Jupiter at its peak magnitude A huge-star supernova may be up to ,,, times brighter than the Sun assuming a vantage point the same distance from each. Greece travel 2016.