You are not logged in.
Why haven't humans reached Mars?
https://astronomy.com/news/2021/09/why- … ached-mars
On the plant chemical question.
The Nitrogen yes the plants do require it, but that can be provided by decay and fertiliser, it doesn't need to be in the atmosphere. It would seem the nitrogen can also be easily recycled
Having an inert gas comprising a large percent of atmosphere will also reduce fire risk.
N2 isnt always good, it can kill divers by way of Decompression sickness but it is an important part of life on Earth, it is a key part of industrial fertilisers, Nitric oxide is used in drug health supplements. Nitric acid is used win cleaning and an an oxidizing agent for rocket fuels.
If you already have a colony on Mars you could also possibly have some kind of floating sky village in the future around Venus, N could then be fired or space-trucked from another planet - probably Venus.
How Do You Get Nitrogen Buffer Gas On Mars?
very interesting topic
Offline
Like button can go here
Designers conceptualize modular housing colony to inhabit planet Mars.
https://finance.dailyherald.com/dailyhe … lanet-mars
Humans on Mars: Pathways Toward Sustainable Settlement
https://idw-online.de/de/news797865
Offline
Like button can go here
This quote is from Post #1 by Russell...
What this points to is an ascent powered by methane/oxygen where the methane is imported (landed) and the oxygen is produced locally. I felt I had to spell that out in case it wasn't obvious what I"m going to say next.
I don't know the timing on this but I'm pretty sure it is in response to Dr. Zubrin's famous proposal to ship hydrogen to Mars to make methane.
It would be interesting to see an energy comparison of the two approaches.
Zubrin's proposal would require shipping hydrogen and keeping it cold.
Russell's proposal would require shipping methane and keeping it cold, but at a much higher temperature.
The comparison would include mass of the shipment and equipment, and the lander for each.
Each method pulls CO2 from the atmosphere. Zubrin's method would use the carbon and Russell's would discard it.
It would be interesting to see which approach is best in overall effectiveness.
(th)
Offline
Like button can go here