
Supernova is a stellar explosion that is more vital than Nova. Supernova (plural) are extremely luminous and cause an explosion of radiation that excels in many cases, for a brief period the entire galaxy before fading from view over several weeks or months. During this short interval of the supernova can radiate as much energy as is expected, emitted from the sun for more than the entire period of her life.
Explosion expels much or all of the material the star at the speed of up to 30,000 km (10% of the speed of light), and driving a shock wave in the interstellar medium surrounding it. This shock wave sweeps up expanding shell of gas and dust called a supernova remnants.
Nova (novae combination) means "new" in Latin, in reference to what...