What is the name given to the expanding shells of ejected stellar material following a supernova?
Answer
A supernova remnant (SNR)
The immense outer layers of the star that are blasted outward form the supernova remnant, an expanding cloud of gas that glows due to shock wave heating.

Related Questions
What specific stellar process triggers the core collapse leading to a supernova?What core remnant mass dictates the formation of a neutron star?What is the primary mechanism that prevents a neutron star from collapsing further into a black hole?What term describes the astronomical concept for all elements heavier than hydrogen and helium?Which elements are overwhelmingly synthesized during the brief, violent moments of the supernova explosion itself?What is the name given to the expanding shells of ejected stellar material following a supernova?How is the extreme density of neutron star material often compared?If the collapsing core mass exceeds roughly three solar masses, what forms at the center of the explosion?What process describes the synthesis of heavy elements like gold and platinum during a supernova?How is the presence of a black hole typically confirmed by observers?