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pulsar
[ puhl-sahr ]
noun
- Astronomy. one of several hundred known celestial objects, generally believed to be rapidly rotating neutron stars, that emit pulses of radiation, especially radio waves, with a high degree of regularity.
pulsar
/ ˈ±èÊŒ±ôËŒ²õÉ‘Ë /
noun
- any of a number of very small extremely dense objects first observed in 1967, which rotate very rapidly and emit very regular pulses of polarized radiation, esp radio waves. They are thought to be neutron stars formed following supernova explosions
pulsar
/ ±èűô′²õä°ù′ /
- A rapidly spinning neutron star that emits radiation, usually radio waves, in narrow beams focused by the star's powerful magnetic field and streaming outward from its magnetic poles. Because the pulsar's magnetic poles do not align with the poles of its rotational axis, the beams of radiation sweep around like the beacon of a lighthouse and are thus observed on Earth as short, regular pulses, with periods anywhere between 1 millisecond and 4 seconds.
pulsar
- A rapidly rotating neutron star . The radiation from such a star appears to come in a series of regular pulses (one per revolution), which explains the name.
˜yÐÄvlog History and Origins
˜yÐÄvlog History and Origins
Origin of pulsar1
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Example Sentences
But pulsars slow as they age and their magnetic fields weaken, so theorists think the beams fade once their rotation rate falls to minutes.
The team measured scintillation bandwidths for 23 pulsars, including new data for six pulsars not previously studied.
The Crab Nebula features a neutron star at its center that has formed into a 12-mile-wide pulsar pinwheeling electromagnetic radiation across the cosmos.
Their new method of detection is based on analyzing pulsars, neutron stars that emit radio waves at highly regular intervals.
Researchers in Manchester and Germany found it orbiting a millisecond pulsar 40,000 light years away.
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