News Desk · Everything Space
Brief suborbital flight shows surface tension dominates water flow in lunar gravity
Image: Phys.org
Understanding how liquids behave at one-sixth Earth gravity could shape how future lunar bases irrigate crops.
A short experiment flown aboard a Blue Origin suborbital rocket has given researchers new insight into how water moves under lunar gravity conditions, a factor that could prove critical for growing plants on the moon.
The study, led by a team including a Florida Tech space biologist along with collaborators from the University of Louisiana at Lafayette and NASA Ames Research Center, tested three liquids—plain water, a glycerol solution, and a salt solution—to observe how their surfaces behaved when gravity was reduced to roughly one-sixth of Earth's level during the flight's brief window of simulated lunar conditions.
Results showed that surface tension plays an outsized role at lunar gravity, causing liquids to flow less freely than they do on Earth. According to the researchers, this means that irrigation systems designed for use on the moon would likely need a different design than those used on Earth.
The challenge is compounded by the nature of lunar soil itself, which consists of fine dust and rock particles that absorb water poorly. Combined with sluggish fluid flow, this could make evenly watering plants in lunar regolith difficult, with uneven irrigation potentially starving plant roots of oxygen and stunting growth.
Notably, the glycerol solution displayed improved flow compared to plain water, suggesting that additives might help liquids move more effectively through lunar soil—an avenue the team hopes to explore in future work.
The experiment marked the first flight of newly built hardware, including a camera and accelerometer to track gravity levels, and the researchers were pleased it functioned as intended on its first attempt. They now hope to pursue longer-duration tests and eventually experiments conducted directly on the lunar surface to confirm and expand on these early findings.
Sources
Written in Everything Space’s own words by our news-desk model from the sources above, and checked against them in code: every number in this report appears in its sources, and no sentence is copied from them.