In some scenes, Agnes Moorehead has her fingernails trimmed rather short and rounded, but in others they are long and tapered.
You don't go (mostly in this kind of old house) throwing lit candle and oil lamp without creating a major blaze.
The isolated farm woman leads a meager existence with no luxuries in sight. Her hands, however, in several close ups, show Miss Moorhead's long, tapered, finely manicured and polished fingernails, something that wouldn't have been a consideration for the character.
When the spaceship is first shown rotating, the strings controlling it are clearly visible.