A surface explosion when a companion spills hydrogen onto its close white dwarf companion creates aGroup of answer choicesType I supernova.Type II supernova.planetary nebula.emission nebula.nova.

What type of supernova starts as a white dwarf, does not show a lot of hydrogen in their spectrum,  and leaves only a confused companion?

What is a planetary nebula?Group of answer choicesthe expanding shell of gas that is left when a white dwarf explodes as a supernovathe cloud of gas and dust from which protostars formthe expanding shell of gas that is blown off by a star when it becomes a white dwarfa disk of gas surrounding a protostar that may form

A nova or supernova Type 1A explosion can form from the last "bang" of a*1 pointred giantwhite dwarfblack dwarfneutron starred supegiant

A group of extremely young stars containing approximately 5 to 50 hot O and B stars is called a(n)?Group of answer choicesassociationopen clusterglobular clusterplanetary nebulae

When a high-mass star runs out of fuel what may it ultimately become? (Mark all that apply)ed8b9a0937f8b757a114e32a04863bd2.webm122 KB ablack hole bwhite dwarf cneutron star dplanetary nebula