Sky science
Pulsar
Direct answer
Pulsar: A Pulsar is a rotating magnetized neutron star whose sweeping emission beams produce regular detected pulses.
It is a cosmic beacon powered by neutron-star rotation or accretion.
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At a glance
- Found in
- Astronomy & Skywatching
- Related
- Brown Dwarf, Neutron Star, Stellar Black Hole, Supernova
It is a cosmic beacon powered by neutron-star rotation or accretion.
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The story behind Pulsar
Jocelyn Bell Burnell identified the first pulsar signals in 1967.
A one-minute story
The Wandering Stars
How the moving planets were watched, named and found, and what a transit is.
Why Pulsar matters
Pulsar’s timing probes gravity, interstellar matter, companions, and gravitational waves.
How to read Pulsar
Correct pulse arrival times for observatory motion and propagation delays.
Pulsar in practice: an example
A millisecond pulsar can rotate hundreds of times each second with exceptional timing stability.
Where readings of Pulsar go wrong
Pulses do not mean the star switches on and off; beam geometry sweeps past Earth.
Sources and editorial method
Research references used for this entry include:
- NASA Science: Stars - NASA overview of stellar birth, main-sequence evolution, giant phases, remnants, and supernovae.
- NASA Science: Universe Glossary - NASA definitions for common stellar, galactic, orbital, and high-energy astronomy terms.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Last updated
- 2026-09-26
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Common questions
What is a Pulsar?
A Pulsar is a rotating magnetized neutron star whose sweeping emission beams produce regular detected pulses.
What do people get wrong about a Pulsar?
Pulses do not mean the star switches on and off; beam geometry sweeps past Earth.
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