Earlier quoted context omitted.
It's how we get to the moon and Mars and how we survive as a species. This is unbelievably pessimistic. You're literally saying that Earth is beyond repair and the only way for humans to survive is to move to a rock in orbit that we've spent a total of 3 days on in the past 70 years, or to a planet no one has visited that has radiation that makes life essentially impossible for us. Assuming that's true, let's run som…
> This is unbelievably pessimistic. It's not pessimistic, it's realistic. It's just that what the parent poster means by "how we survive as a species" and what you mean are...different things. Going to the moon, going to mars, are necessary for the survival of our species...on a 100,000 year time horizon. At some point, something catastrophic may happen to earth. An asteroid impact, or a Gamma Ray Burst, or some othe…
>It's not pessimistic, it's realistic. [...] on a 100,000 year time horizon.
It has been 65 years since Sputnik was launched, so you are projecting out 1,565x that duration into the future. I'm sure you picked a nice, big, round number, but I think it's really important to grapple with how immediate all of space travel has been against how long our horizon is as a species is.
The first record we have of homo sapiens is from 300,000 years ago[1] - so 3x your time horizon. The founding of civilization could be pegged around 4,000 years ago with the founding of Babylon[2]. 100,000 years is about 25x the duration of the existence of civilization.
So I agree that space exploration must come at some point, but I actually think the most "realistic" approach would be to *ban* space exploration until climate change is under control. Fixing our impact on our own climate has fewer technical barriers and is a larger limiting factor to human survival than space. If the time horizon is really 100,000 or 10,000 years, then addressing climate change would be a blip on that timeline.
[1] https://theconversation.com/when-did-we-become-fully-human-w...
[2] https://en.wikipedia.org/wiki/Babylon
Edit: accidentally a word