Hibernation during space travel is a common sci-fi trope, but I wasn’t aware anyone was actively working on it. What I find particularly compelling here is that hibernation could have positive effects on bone density change as well as helping mitigate the effects of radiation exposure.

Another thought occurs to me, though it is not mentioned here. Keeping the travelers contained in a small area opens up options for radiation shielding that might otherwise be prohibitive. What about sleeving the hibernation quarters in water, for instance? If that water could be mined from the Moon, the cost of lifting it for use in the craft could be acceptable.