Author Question: Supernova remnants _____. a. always contain pulsars, because pulsars supply the ionizing ... (Read 73 times)

cagreen833 · **on:** Jul 27, 2018

Supernova remnants _____.

a. always contain pulsars, because pulsars supply the ionizing radiation
b. often last longer than a pulsar does, so the central pulsar may no longer be visible
c. rarely contain pulsars, because pulsar radiation disrupts the remnant
d. may not contain a pulsar, if the supernova explosion kicked the pulsar away at high speed
e. never contain pulsars

Question 2

Kepler originally proposed that the planets were spaced apart by ____.

a. five spheres
b. five regular solids
c. six tetrahedrons
d. five epicycles
e. six regular solids