logoalt Hacker News

apitoday at 2:24 AM2 repliesview on HN

2.4% is not bad given how new this still is and how extreme the speeds and energies are.

Note that all the fatalities have been launch or landing related, not in space itself. Clawing out of this gravity well is tough. Make Earth a bit larger and you’d never get off it without something like NERVA or nuclear pulse Orion.

I wonder sometimes if that’s another thing to toss in the Fermi paradox bucket. Many rocky planets might be much more massive than Earth. On one with 3X our gravity a space program might never get going.


Replies

m4rtinktoday at 4:33 AM

NERVA as envisioned had terrible thrust to weight ratio, not really usable to launch from a Super Earth. Nuclear lightbulb, orion or heck NSWR would likely work though. And bonus points for not having to think about landing systems for the return trip. ;-)

Shitty-kittytoday at 3:24 AM

The lack of plate tectonics is a much bigger obstacle on Super-Earths, then g.