pulsar

/puhl-sahr/US // ˈpʌl sɑr //UK // (ˈpʌlˌsɑː) //

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Definitions

n.名词 noun

1
- : 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.

That’s because anything that nudges a pulsar — say, a passing ripple in spacetime — alters when its ultraprecise radio beats arrive at Earth.
At the center of the cloud lies a pulsar—an 18-mile-wide neutron star that whirls around wildly about 30 times each second.
Your beautiful cartoon of a pulsar … is for these two stars completely wrong.
It remains possible that this pattern is instead coming from some unknown, common source of noise in the pulsars, or in the clocks that measure the blips’ arrival on Earth.
The first clue is the behavior of a pulsar—a tiny but massive object that rapidly rotates, sending flashes of light toward Earth.