(1) As matter builds in the space between the stars, the increase in energy can cause matter to be ejected from the system as a nova or supernova.(2) For the same reason, the Star is unlikely to have been a nova, even though Chinese astrologers recorded the appearance of bright novae or u251cu00f6u251cu00e7u251cu2510guest starsu251cu00f6u251cu00e7u251cu00fb in March, 5 BC and April, 4 BC.(3) The camera pans across a galaxy of stars and planets, novae , and nebulae twinkling in the blackness.(4) For example, amateurs have always been to the fore in discovering comets and novae , hunting for supernovae, and monitoring events happening on the planets.(5) Environments are filled with planets, black holes, novas , asteroids and wormholes among other objects, and each is rendered with stunning detail.