Bbc World Service The Climate Question Is Space Travel A Problem Five separate constraints, distance, light speed, energy, biology, and time, combine into what feynman described as “absolute walls that prevent civilizations from ever meeting.” these are not. However, the harsh reality is that interstellar travel might be fundamentally impossible, not because we lack imagination, but because physics itself says no. here’s why we might be stuck here forever.
From Space Travel In The 1960s To Space Tourism In The 2030s To make interstellar travel practical, we’d need to move at a significant fraction of light speed. that means surviving radiation, controlling impossible energy levels, and somehow avoiding collisions with even the tiniest particles—each capable of catastrophic damage at those speeds. Send a spaceship into the depths of space at speed, and its passengers will experience time and distance differently to the observers watching their journey from afar. this contrast comes courtesy of relativity, a theory that's been tested successfully time and time again on all manner of scales. If humanity survives for a long enough time and becomes sufficiently proficient at space travel, and especially if some alien threat arrives on our shores that unites humanity, yes, there’s a chance (even in the sense of dumb and dumber) that interstellar travel is possible. In this powerful 23 minute lecture, susskind explains why faster than light travel violates relativity, why energy requirements become astronomical, and why even near light speed journeys face.
From Space Travel In The 1960s To Space Tourism In The 2030s If humanity survives for a long enough time and becomes sufficiently proficient at space travel, and especially if some alien threat arrives on our shores that unites humanity, yes, there’s a chance (even in the sense of dumb and dumber) that interstellar travel is possible. In this powerful 23 minute lecture, susskind explains why faster than light travel violates relativity, why energy requirements become astronomical, and why even near light speed journeys face. This paper explores why interstellar travel, though inspiring to imagine, is almost certainly impossible within the boundaries of known physics, thermodynamics, and biology. Interstellar travel is unfeasible with chemical rockets due to immense distances and physical laws. plausible future solutions include laser pushed sails for tiny probes, nuclear fusion rockets for large payloads, and theoretical antimatter drives. Several centuries ago, manned flight through earth’s atmosphere was plausible, but technically impossible. today, the same can be said for manned interstellar travel: it might become possible through some sort of as yet unimagined invention in ten years, or a hundred, but don’t hold your breath. If you’re wondering why taking a trip to another star is incredibly difficult, blame physics. conservation of momentum (or newton’s third law, depending on how you want to look at it) requires a rocket to poop out some amount of mass at some speed (aka explosive fuel) for the rocket to move.
Comments are closed.