### star | neutron star:

Pulsar
* All pulsars lie close to the braking curves calculated for their respective polar magnetic fields
  - produce a wind of highly energetic electrons
* Most pulsars are single neutron stars but they can also exist in a binary orbit with a companion.
* Some pulsars also emit X-rays
  - are observed to lie within supernova remnants
  - rotate several hundred times per second
* are 'neutron stars', which form in the aftermath of a supernova explosion
  - actually a manifestation of the exotic stars known as neutron stars
  - among the fastest objects in the galaxy
  - believed to be neutron stars that are spinning very rapidly
  - compact, pulsed sources of polarized emission
  - considered to be rotating neutron stars, remnants of some supernovas
  - dead stars that rotate extremely fast, sometimes several hundred times a second
  - extremely accurate clocks
  - located in universes
* are neutron stars formed by the collapse of massive stars during supernova explosions
  - in the collapse of massive stars in supernova explosions
* are neutron stars that emit highly rhythmic radio pulses
  - pulses of radiation once per rotation
  - radiate energy at regular periods See
  - spin rapidly as they emit powerful beacons of radio waves
  - which emit beams of radiation
* are neutron stars, collapsed remnants of much bigger stars that have exploded as supernovae
  - which are themselves the collapsed cores of supernovae
  - only dangerous when they are pulsing
  - really a sub-class of neutron stars
  - simple in theory, but complex in reality
* are the collapsed cores of massive stars left behind after supernova explosions
  - result of supernovae explosions
  - thus very accurate celestial clocks
  - usually very far away so little visible light reaches the earth
* are very easy to detect with radio waves because of the rapid fluctuations
  - small, dense stars known as neutron stars
* emit electromagnetic radiation in all regions of the spectrum, visible as well as radio.
* emit radio pulses at fixed intervals as small as a few milliseconds
  - waves extremely regularly as they rotate
  - tremendous bursts of energy in radio, visible light, and x-ray wavelengths
* emitting visible light look like normal stars.
* get their name because their emissions appear to turn on and off, or pulse, very rapidly.
* live billions of years.
* make exceptional clocks, which enable a number of unique astronomical experiments
  - incredibly accurate clocks
* originate when an old, massive star explodes as a supernova.
* radiate away their rotational energy
  - just like main-sequence stars
* rival the world's ensemble of atomic clocks in timekeeping stability.
* send radio flashes sweeping across the sky like lighthouse beacons.
* show coherent radio emissions and powerful X-ray emissions.
* slow down with increasing age.

### star | neutron star | pulsar:

Binary pulsar
* are one of the few tools scientists have to detect evidence of gravitational waves.
+ Binary pulsar, Relativity: Types of stars :: Relativity
  * Binary pulsars are one of the few tools scientists have to detect evidence of gravitational waves. As the two stellar bodies draw closer to one another, often one pulsar will absorb matter from the other, causing a violent accretion process. This flow of matter from one stellar body to another is known as an accretion disk.