From what I remember in my photography days, a 55mm lens is said to be accurate and true.
For 35mm or equivalent film or sensor, then yes, a 50-55mm lens would approximate the view of a human eye (normal). However, for different film/sensor formats, different focal lengths would be considered normal.
NASA is likely using something down in the 14-24mm range, and sometimes it even looks like they could be going lower than 14mm.
Without knowing the film/sensor format, then throwing around random numbers is rather pointless.