Historical clue formulations

• Terra ___ — 2015-10-08
• Terra ___ — 2014-03-05
• Terra ___ — 2013-02-09
• Latin land descriptor — 2007-12-29
• Terra ___ — 2003-01-20
• Terra ___ — 2001-07-10
• Solid, in a phrase — 2000-11-25
• Terra ___ — 1997-01-24
• See 30-Down — 1994-06-27