1933

Neutron star

• In 1572, Tycho Brahe saw a supernova.
• In 1933, Baade and Zwicky explained
• that such an event could be
• the collapse and explosion of a massive star
• that leaves a dense spinning core of neutrons.

Neutron stars

• It could become a pulsar.
• It could become a magnetar.
• It could become a protoneutron,
• quark, electoweak, or preon star.
• It could become an X-ray binary pulsar
• or a radio-quiet supernova remnant.

Glitches

• The spinning of a neutron star,
• some say, is more accurate than a quartz watch;
• however, glitches can occur
• that speed it up or slow it down.
• A love even as true as that
• may sometimes settle into something finer.