Test 1 Duolingo Interactive Reading

Supernova

Supernova

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Fill in the Blanks:

A supernova is a powerful and luminous explosion of a __________.

A supernova occurs during the last evolutionary stages of a massive star, or when a white dwarf is triggered into runaway __________ fusion.

The original object, called the progenitor, either collapses to a neutron star or __________ hole, or is completely destroyed to form a diffuse nebula.

The peak optical luminosity of a supernova can be comparable to that of an entire __________ before fading over several weeks or months.

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