Question

The explosion of a supernova appears to leave behind

A) a rapidly expanding shell of gas and a central neutron star.
B) a rapidly rotating shell of gas, dust, and radiation, but no central object.
C) a rapidly expanding shell of gas and a compact white dwarf star at its center.
D) nothing; the explosion changes all the matter completely into energy, which then radiates into space at the speed of light.

Answer 1

A type II supernova explosion of a massive star leaves behind a rapidly expanding shell of gas and a central neutron star. This is seen in observations of supernova remnants, such as the Kepler Supernova Remnant. These remnants emit energy and contain elements produced in the exploding star.

Step-by-step explanation:

A type II supernova explosion of a massive star appears to leave behind a rapidly expanding shell of gas and a central neutron star. This is supported by observations of supernova remnants, such as the Kepler Supernova Remnant, which show the expanding remains of a supernova explosion. These remnants emit energy at various wavelengths and are rich in elements produced in the star that exploded.