Might Astronauts Be Able To Dive Through A Liquid Airlock Into A Lunar Cave Habitat From The Surface Vacuum? (Like A Barometer)

This is a rather fun idea by Peter Koch originally suggested in the Moon Miner's Manifest Classics...

Yes, We Can Rise To The IPCC Target To Keep Global Warming Within 1.5°C (2.7°F)

The basic message of the IPCC report is that we need to act now before 2040, to avoid more expensive...

Fun Speculation - Can Neptune Sized Exomoon Have Moonlets Like Neptune's Triton? Or A Ring? Even Moonlets Of Moonlets?

Just before the flyby of Pluto by New Horizons I wrote a speculative fun article about whether...

Does 'The Goblin' Make Neptune Sized Planet 9 More Likely? ... And Are Mars Or Earth Sized 'Goblin's Possible?

Does this discovery of 'The Goblin make 'Planet 9' more likely? Yes I’d say so. It&rsquo...

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Robert WalkerRSS Feed of this column.

I'm Robert Walker, inventor & programmer. I have had a long term special interest in astronomy, and space science since the 1970s, and most of these blog posts currently are about Mars and space... Read More »


Planet dwellers like us naturally look first to other moons and planets for colonization. Yet, asteroids have enough resources to build space habs for trillions, with the same living space per person as for Earth.

The idea is to use the materials from the asteroids and NEOs to make new habitats. This gives far more living space than the amount you get if you hollow asteroids out, and live inside them.

The Moon and Mars are our only choices for surface colonization in the near future. Neither is a second Earth; both have many issues at present, especially, the almost total lack of atmosphere. Technically, Mars does have an atmosphere, true, enough for winds and dust storms, but it is so thin it would count as a laboratory vacuum on Earth.

People often ask, "How close are we to sending humans to Mars" and it's not surprising given the optimistic presentations by Elon Musk and others. However, Mars is just too far away to send humans at this stage.

This originated as my answer to a question on the Quora question and answer site: "In what general knowledge domains do alternatives to Wikipedia exist that are significantly superior?". Of course there are examples of much better specialist encyclopedias for various knowledge domains. But you can also do better than Wikipedia using content derived from Wikipedia itself. I think my own new wikis are an example of this, for a simple reason. Because we can fix various errors that can't be fixed there and add new content that can't be added there.

If you search Wikipedia for present day habitats on Mars, then you will find many articles about Mars colonization, but on the idea that there might be microhabitats for present day life there, you'll find almost nothing. You'll find my Present day Mars habitability analogue environments on Earth but nothing about the possible habitats they are analogues of. So why is this? Well there was an article on this until just a week or two ago, but it is now deleted.

This is scaring some people - because they describe dramatic things that could happen like floods tens of meters deep, and the world too hot for humans. Most of this is for far into the future. The sea rising 10s of meters would be thousands of years into the future - many of the news stories didn’t make that clear.

Trump has had a lot of criticism after the summit, with many saying he conceded too much to Kim. I don’t think he did at all myself. The main thing he gave him was a meeting with him, and a couple of days of his time. And he built trust. He thinks that’s important. Previous presidents didn’t think it was important, they proceeded on a basis of distrust. He is trying something new.