Answer:
supernova :an explosion of a star
nebula: a large mass of gas and dust
Explanation:
Supernova can be described as the explosion of a star. this explosion occurs with much force and power. Supernova is a transient explosion event. It is triggered by a runaway nuclear fission reaction.
A nebula can be described as a cloud formed of dust and gases like hydrogen, helium and other kinds of ionic gases. It occurs when an interstellar collapse due to gravitation.
