milliméterév

Milliméterév is a Hungarian neologism that translates to "millimeter-year" and represents a unit of astronomical distance or time. It is primarily used in discussions related to the scale of the universe and the expansion of spacetime, often in the context of cosmological models. The unit can be interpreted in two distinct ways, depending on whether it refers to distance or time.

As a unit of distance, a milliméterév would represent the distance light travels in one year, scaled down by a factor of one millimeter. This is a highly conceptual unit, not typically used for practical astronomical measurements, but rather to illustrate vast scales in a more relatable, albeit abstract, manner. It's not a standard scientific unit like a light-year or parsec.

Alternatively, it can be understood as a unit of time related to the expansion of the universe. In this interpretation, it might describe the amount of time it takes for the universe to expand by a distance equivalent to one millimeter, relative to some reference frame. This usage is also highly theoretical and serves to conceptualize the rate of cosmic expansion over very small intervals or scales. The term is more of a thought experiment or a linguistic curiosity than a formally defined scientific quantity.