They fly hundreds of thousands of kilometres in seconds to the Moon, at speeds that would actually make time dilation an issue for them, the wavelengths of light shift a bit and so things are discoloured somewhat, and the Moon literally look thinner to them enough to be noticeable to the unaided human eye. But yet this power is rarely touched on.
At least it would explain Usagi´s caloric intake.
At least it would explain Usagi´s caloric intake.