From our vantage point, this causes the pulsar to twinkle, or "scintillate." The effect is similar to how turbulence in Earth's atmosphere makes stars twinkle in the night sky. Pulsar scintillation ...

That’s probably for the best because that, too, is not so easy. What about stars, though? Do they also confound any sort of palatable definition? In a very broad sense, a star is simply one of ...