User contributions
- 13:39, 7 May 2013 (diff | hist) . . (-1) . . Astrophysical warm-up (→Problem 13: elderly Sun: undo test edit) (current)
- 13:38, 7 May 2013 (diff | hist) . . (+2) . . Astrophysical warm-up (→Problem 13: elderly Sun: test edit)