Comment by csmoak

17 hours ago

I guess the fact we see any at all given the distance and small angles just emphasizes how many there are out there...

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csmoak

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aplavin  8 hours ago

Yes, even observing a single jet pointed towards us (typically, at just a few degrees) is routinely used a strong argument for existence of many similar powerful sources, just misaligned with the Earth. Arguments like:

- See a jet at redshift z ~ 6? There are thousands more!

- See that well-aligned blazar jets are among strongest gamma ray (or neutrino) sources? Gamma rays/neutrinos are preferentially emitted along the jet direction, otherwise we'd seen thousands more equally strong sources.