What is ‘Nemesis’?
There is an unproven theory that the Sun may be part of a binary star system containing a distant dark companion named ‘Nemesis’.
When was the first double (binary) Quasar discovered?
The first double Quasar(named 0957+56) was discovered in 1980.
What is a Pulsar?
Pulsar is an abbreviation for Pulsating Radio Star, first discovered in 1967. Pulsars are radio sources which emit brief pulses of signals at very regular short intervals of typically one second or less.
