They have designs for rotating habits that simulate earths gravity.easy solution.
We weren't built for space travel so traveling to other stars will remain fiction. It is also the reason that space aliens won't be coming here either. Our only space ship will continue to be earth.
Here we go again! They are always saying "Getting high hurts you" . Nothing new here.
@Nobody: There is no reason why technology won't eventually solve those problems. However until there is better shielding and functional artificial gravity humans should stop going to space.
Ultimately AI will advance to the point of advancing our step into the galaxy and beyond. Homo Machinicus will carry us beyond Earth!
Bill S.
All the zillions of dollars wasted and continue to be wasted on this stupidity of space travel. Money that could help people on this planet from starving to death. What a great waste for humanity.
Douglas Bennett Rogers
People proved going faster that 60 mph would kill you. They proved heavier than air flight was impossible. They proved supersonic flight was impossible. Going to the Moon was science fiction.
I've seen a lot of articles that discuss all the elements that cause problems with human health, that are mentioned here, except ONE! Home sapiens evolved on this planet, specifically for this planet, no other. Some decades ago a number of experiments were carried out to see what effects environmental changes could have on the human body functions. These consisted of putting a group of people underground with no contact with the surface. One group settled down to a roughly 25 hour day, but living in artificial light for a month or more had little effect otherwise. However one thing that was found was that if placed in a Faraday cage, where their bodies were shielded from the planets natural frequency of around 8 Hz, their body systems went crazy within a couple of weeks! This is because many functions of the body use this frequency as a clock, and without it they cannot function correctly. It may be this that causes a cell's mitochondria to malfunction, rather than, or as well as, changes in gravity and radiation.
The results of this experiment seem to have been overlooked so far by all investigations that I've read. How this factor can be reproduced for astronauts, is a serious question.
Gravity isn't the big problem. Cosmic rays are, particularly outside the solar system. Just one could scramble your brain. Then there is the problem of any meteors or tiny asteroids (even space dust) hitting a space ship with the force of millions or billions of times more energy than a high powered bullet. While the odds are less on a short trip, on a years long space flight the odds go up considerably. On any dark night you can see dozens of meteors which are within a hundred miles of you and bombard the earth continually. If a tiny cosmic ray can kill, how do you shield against anything larger? Disposable drones are the best solution. Send enough and a few will survive.
Screw the "we can't do it" types. All of you "Negative Nellies" can just go somewhere else and let us get down to figuring things out. We have the lowly Tradigrade for inspiration. We will gene-engineer the human body for whatever environment we need to deal with. Primitive Humans are an endangered species.