Astronomers still have long way to reach stars (brief from recent 100YSS conference)

[Human No More]

Originally Posted by Clarke

Amazingly, AFAIK, Project Valkyrie is still the most viable option, but it is still astronomically expensive. (Pun very much intended. ) It has energy costs comparable to the output of entire countries at minimum, before you get things like engineering losses and energy costs to store its fuel.

(The fuel in question happens to be supercooled antihydrogen. This is not the most stable substance in the universe.)

Yeah, it's the basis of the ISV's engine; the ISV just has the solar sail added as well.

Honestly, it doesn't matter about distance so much since it will be a few decades until we can visit; we should at the very least be sending probes to nearby systems so we know what to see when we can visit - even if they take 20-30 years to arrive or so, that's fine since then we will have the data by the time it's plausible to go there.