Ross Eckler explored planet packing in the May 2001 issue, attempting to generate an algorithm to create a string of letters from which the names of the planets could be read sequentially. Ross suggested readers might like to explore possible strings for other groups of names.
"Day and Color Packing,"
Word Ways: Vol. 34
, Article 16.
Available at: https://digitalcommons.butler.edu/wordways/vol34/iss3/16