Alpha Centauri lies about 4.4 of which units away from us?

Along with 10 other former Soviet republics, Turkmenistan joined which group on December 21, 1991? Along with much of Lorraine, which French province was annexed by Germany in 1871? Along with Snap, which two elves have appeared on boxes of Rice Krispies since the 1930s? Alpaca wool was a major commodity in which South American empire that expanded greatly in the 1400s? Which magazine did John H. Johnson found in 1951, six years after he founded Ebony? Listed alphabetically by first name, which U.S. president comes last? Listed alphabetically by last name, which U.S. president comes last? Which continent's countries run alphabetically from Argentina to Venezuela?