NavList:

For those of us learning celestial navigation for the pleasure of mastering something new and different, for venturing out of our comfort zone, the following New York Times article will probably resonate:

Excerpts:
"Find something — something new, something difficult — to immerse yourself in and improve at."

"When is the last time you improved at anything? ... I am talking about improving at a demanding skill or set of skills — a craft, a discipline. I have in mind something that will take years to get proficient at, something that there is a correct way of doing, handed down for generations or even ages, and for which there is no way for you to create shortcuts with your cleverness or charm. Playing the cello, maybe. Or cabinetry..."

Or celestial navigation, for that matter.

Full text: nytimes.com...better aging

I'll defer to the medical doctors among us, however, to comment on whether mastering CN (or any similar pursuit) will help sustain mental activity and slow down the aging process.

JMcD
28° 21.1' N
80° 43.5' W