Neutrinos are things that travel through my vacuum
Their existence is recognized by their effect
Much like human interaction
One doesn't have to be visible to have an impact — Rxspence
Yes. Both energy and matter can propagate through empty space. But a Neutrino is like a Photon, in that it can indeed "travel through a vacuum". So it is imagined as a tiny bullet (a particle of mass). But the wave nature of a Photon, and presumably of a Neutrino, was a puzzle for early physicists. How can a wave propagate without some physical medium to compress & release?
One proposal was the Luminiferous Aether, which was hypothesized to be almost as close to nothing (i.e. mass) as a Neutron. When researchers found no evidence (measurable effects) for aether, the theory dropped out of favor. But Einstein, while abandoning that discredited term, attributed aether-like properties to his hypothetical Gravity Field. In that theory, empty space was treated metaphorically as a physical substance (e.g. fabric of space). Unfortunately, to this day, the "fabric of space" is undetectable by physical means. So, it remains a metaphysical concept, defined in abstract ethereal mathematical terms. Hence, the vacuum of space is still as close to nothing as ever.
Luminiferous Aether :
Albert Einstein sometimes used the word aether for the gravitational field within general relativity, but this terminology never gained widespread support. We may say that according to the general theory of relativity space is endowed with physical qualities; in this sense, therefore, there exists an aether.
https://en.wikipedia.org/wiki/Aether_theories