It has up and down AND walls can be at different angles!

You’re a space marine and fight demons.

[0] https://en.m.wikipedia.org/wiki/Kill_the_Moon

http://www.projectrho.com/public_html/rocket/appcapedread.ph...

EDIT: To summarize a big page, Demimos is relatively close to Low Earth Orbit in delta-v terms so it makes a convenient place to top up fuel tanks with volatiles extracted from the carbonaceous before heading further outwards. Maybe.

https://en.wikipedia.org/wiki/Marathon_(video_game)

With a surface gravity of 0.003 m/s, even slight twitches by an astronaut would be enough to launch off the surface.

The flip side of that is a sample-return mission (as with OSIRIS-REx) could work with a similar mechanism and manuvering. Though obviously more delta-V is required to get into and get out of Mars orbit.

Mass wise, we're talking about Deimos at 1.5x10^15 kg, vs Dimorphos at 5x10^9 kg.

A nice paper on the different ways of orbiting the Martian moons and their trade-offs:

https://sci-hub.ru/https://doi.org/10.2514/6.2012-5067

Deimos is much smaller, but because it's further from Mars there is a region right above the surface (below 700 meters or so) where you could have stable orbits.

[1] https://www.sciencedirect.com/science/article/abs/pii/S03043...

> "a gravitational field of about 0.15 g is necessary to provide effective orientation information"

That's slightly less than lunar gravity (0.165 g). But, it's about the minimum amount needed to be able to use gravity to detect orientation, and is not necessarily enough to detect it reliably. That's thought to be one reason astronauts fell so often on the moon, although there were certainly other factors as well.

The paper also observes:

> Benson [30] showed that 0.22 g was not adequate to provide a vertical reference during experiments in the International Microgravity Laboratory (IML-1) on board Spacelab and Clément et al. [31] showed that in microgravity, 0.5 g provided by a centrifuge was enough to produce a perceived tilt of 90°. These values suggest that indeed it is likely to be the case that even after adaptation to a microgravity environment, forces in excess of 0.15–0.3 g are required to provide a behaviourally useful gravitational reference.

To answer your question, since vision is an important part of our orientation mechanism (also analyzed in the linked paper), it's likely that astronauts on the moon would have more difficulty with their eyes closed. Not necessarily that they'd have no sense of up at all, but that it wouldn't necessarily be accurate, so if they tried to walk with their eyes closed, they'd be much more likely to fall.

Alan Shephard and Ed Mitchell reported that the 7 degree tilt of their lunar module interfered with their sleep, which suggests it was noticeable. But it would be hard to point to something in their cabin arrangements that didn't interfere with sleep.

But even cladding the surface to keep it together, you're talking about many tons and tons of rock you suddenly need to keep together. At that point, why not make a space habitat completely separate from the asteroid? It seems silly to put your base on the gravity of an asteroid and then try to undo the gravity of that asteroid.

That, sir, sounds like a challenge! I accept!

There have been people playing with the possibility of using it as a refuelling station, because it's thought to contain a lot of water.

Most healthy adults should be able to do that, especially with a running start. It's about as much as you need to do to get a passing grade in PE at age 16 in most places. Also in this hypothetical you don't have to fight much gravity while accelerating - only inertia.

(Except, as others have said, I wouldn't have the traction to accelerate.)

Do you think we have as much understanding of Deimos as our own moon? Do you think we have as much understanding of this particular moon that never really had any close up analysis performed on it as much as any of the better known moons in the solar system where we've actually sent probes to fly-by/orbit and observe?

In other words, little-known is not referring to do people know the name or not

I mostly remember Ambrosia for the Escape Velocity series though, especially Nova.

1: https://archive.org/details/deimos_rising_soundtrack

2: https://themercurytree.bandcamp.com/

On the subject, for a little blast from the past...the Marathon's Story website is still around-

https://marathon.bungie.org/story/

28 years old, a little noteworthy!

There have been people playing with the idea of using it as a refuelling station, because it's thought to contain a lot of water.

Time to start selling real estate there. Get in before the ground floor, imagine the profits! All the cool pipples are doing it, you wouldn't want to miss out.

Will still take a few million years.

Checked the mission site but they haven't updated their images page in quite a while.