I was just watching a TV show that dealt with M1 - The Crab Nebula. They were saying that there is an immensely powerful pulsar in the middle of it that we “see” because as it rotates the “magnetic poles” sweep in our direction.
So, if the poles did not “sweep over” us, would we know a pulsar was there? Lets forget for a moment that the nebula is there at all. If there was just a pulsar like it say, 5 light years away, would we even know it since they are reportedly so small (only a few KM across)?