alt Hacker NewsAlso, we've realized the scientific reality that traveling faster than light is likely impossible, and the vast distances to other habitable planets would mean tens of thousands of years of travel even with the most efficient technology.
Interstellar space is also hostile to life, and any life present at the destination will not use the same DNA coding for protein (if gene expression even works that way).
We also do not yet have the technology for a complete survey of nearby habitable planets.
It is not an encouraging line of thought.
Replies
> the vast distances to other habitable planets would mean tens of thousands of years of travel even with the most efficient technology.
Spoken like someone who's never read Tau Zero
Not sure your point. It's fiction. Are we closer to finding dragons, faeries, or magic?
Visiting remote planets is as unlikely as riding a dragon. But both make for great stories.
You don’t need to go faster than light. Once you approach anywhere near the speed of light, time slows down so much that journey time becomes irrelevant.
That's true, but stop to consider all the things we ARE doing...
* Space Station that lasts 25 years
* 3,000 satellites providing Internet Service
* Mars rovers that run for 10+ years
* Flying helicopters on Mars
This is motivated pessimism. We knew in the 50s that breaking the speed of light was highly unlikely. We dreamed of the stars anyway. Now we refuse to dream, or to even attempt to solve the problems (a common pattern when discussing spaceflight is people who are blatantly searching for problems, rather than solutions), because we are pessimistic, devoid of imagination, and seek to legitimise our collective depression through scientific and engineering arguments.
Maybe, but the most compelling scifi to me personally is the generation ship stuff, like Ring by Steven Baxter.
And yet we still have a solar system, empty of life other than Earth, we can expand to. Why try to cross an ocean when everything we could want is across the river?
Two things baffle me:
1. The idea that Terran life is toxic and must not be allowed on other planets in the solar system.
2. The one person who is advancing our space faring abilities by leaps and bounds is routinely vilified and excoriated on HackerNews.
I believe we already have the resources to colonise the Moon and maybe Mars right now. There would have to be considerable R&D, and willpower, and it would be very expensive but I think it is within our powers. Humans would have to live underground and deal with dust, maybe microbes in the case of Mars, but we could do it. The spaceships to go to Mars would have to be big but they could more easily be built on the Moon due to the lower gravity.
There is a scene in Pirates of the Carribean where captain jack is stuck in a void surrounded by duplicates of himself. It is his hell. As we have biult better and better telescopes we realize that as we expand into space we will be stuck talking only to ourselves, at least for a few thousand generations.
When they turned LIGO on i wanted to see warp drives whipping around. But all we saw was distant black hole mergers; interesting but not exactly a star trek moment. When areicebo fell and was not immediately rebiult, i realized that most people just dont care about ever meeting another civilization. Even if we did find one it wouldnt change much here on earth. Most people dont care about climate change. They dont care about anything beyond their own lifetime. What matter will aliens be if they are a thousand lightyears away? So people dream now about other things, about grimy politics and alternative history.
> we've realized the scientific reality that traveling faster than light is likely impossible
Would any of the stories about the characters’ relationships with people not traveling with them be entertaining given the effects of time dilation?
> and any life present at the destination will not use the same DNA coding for protein (if gene expression even works that way).
Well, that could be worked around in the world building. My favorite SF-friendly scenario would be if life originated in the Sun's natal cluster (perhaps not around the Sun itself), with tens of thousands of star systems, and spread between them before the cluster dispersed. Presumably panspermia would be much easier in such a situation because the stars are closer together and because maybe residual gas could help particles get trapped near other young systems. In this case all the "infected" systems could have the same coding.
A nice consequence of this scenario is it's compatible with the Fermi argument: even if origin of life is unlikely, it just had to happen once here, and so it not happening elsewhere in the galaxy (or even visible universe) is not a problem.