Is Hebeth Mars?

And if that's the case, then DOOM Slayer somehow travelled back in time when he first appeared at Argent D'nur, because:

1. Aggadon Hunters are not yet extinct.
2. The events in missions 2 and 3 couldn't happen in the time from which the Slayer came, otherwise humans would know that life exists on Mars, and would know that Argenta exist; which they apparently don't.