Epsilon Minus was created in 2000.

Then you know that the medium is vacuum in free space.


And by the way, it's "epsilon naught", not "epsilon not".
"Naught" means "zero", and "epsilon naught" means " ε0 " .

V

There is no star with that name. Many stars have names that start with "Epsilon", followed by the genitive of a constellation, e.g. "Epsilon Cruxis", "Epsilon Geminorum", etc.

If its epsilon segin cassiopeia, it is 520L/Y(light years) away from earth.

Lancia Epsilon was created in 1911.