Five Realistic Options for Interstellar Travel
PBS Space Time · Explainer · 13 min · 2015 · YouTube title: 5 REAL Possibilities for Interstellar Travel
Why it's here
HN commenters link it in propulsion and space threads as an episode on interstellar travel that needs no unknown physics.
What it covers
PBS Space Time surveys five realistic options for interstellar travel, from conventional rocket fuel to antimatter and nuclear pulse propulsion. The options rely only on known physics.