General Discussion
In reply to the discussion: Swarm of mysterious radio bursts seen coming from deep space [View all]Blue_true
(31,261 posts)I agree with your observation on distance, not sure that I fully agree that humans won't one day reach another star.
The nearest star to us that may support life is around 1 Parsec away from us, around 19 trillion miles. The distance is enormous given that in all of our history to date, we have managed to just get a spacecraft past the Sun's heliosphere at around 10-12 billion miles. So the task of even getting a robotic craft to 19 trillion miles is enormous still, add onto that sending humans and supporting their life over such a distance, as well as getting them back safely. Totally mind boggling to think about.
Where I somewhat disagree with you is on the possibility of one day getting at least a robotic craft to another nearby star. Someone here on DU pointed out last year that if a spacecraft simply continuously accelerated at the Earth's gravitational acceleration, it would reach the speed of light in a little less than 1 year, IF IT FOUND THE ENERGY TO SUPPORT THE CONTINUOUS ACCELERATION, added the caps to highlight what I am sure you know is the big problem, finding the energy to sustain acceleration. This is where I go a little weird, I truly believe that there is another undiscovered force of nature, and when it is discovered and understood will make ultra deep space travel possible, even travel toward the galaxy core. Maybe it is my inexperience in this area, but when I see Astrophysicists explain celestial body orbits, I get the feeling something is missing. If you look at our own star, planets progressively revolve slower around the Sun the farther they are from it. The explanation for planetary orbits is primordial momentum being maintained in a vacuum, but the same people mention how collisions have changed the spins of Venus and Uranus, yet somehow did not change their revolution speed order - when I think about what I learned as an engineering student, I find it difficult to grasp how one vector of momentum can be completely reversed without a second vector being altered significantly - that has led me to believe in the unknown force concept that some people are pushing. Once we learn how to modulate gravity and the unknown force is a spacecraft, we should be able to accelerate a space craft up to the speed that our galaxy core revolves in the univers - being able to reach that speed would allow spacecraft to reach the nearest star in weeks or a few months, and allow them to avoid colliding with object in space. Just my take, admittedly an uninformed one.