The California Supreme Court plans to announce its decision on gay marriage today, ruling on the constitutionality of Proposition 8, which was passed in the November 2008 elections. The court will also decide whether to "sustain the marriages of an estimated 18,000 gay couples who wed before the measure passed with 52 percent of the vote," the Washington Post reported.

Los Angeles Times reporters prepared a Q&A with facts about the decision for the paper's LA Now blog.