Various aspects of operating the lunar station in a resonant NRHO have been deeply studied, including station-keeping techniques, Earth-NRHO and NRHO-Earth transfer opportunities, challenges in short-term and long-term navigation, eclipse conditions, and shadow avoidance strategies.

It was a biannual from April 1970 to October 1977 and has been a quarterly since fall 1978.

That's not to imply that it's wrong for your arm or hand to show up in a selfie.

it’s okay to be an Everlark shipper who still likes and respects Gale, and it’s okay to be an Everthorne shipper who adores and admires Peeta.