The Agenda

by Dan Verrier

Lots of things are going on at the edge of the Solar System these days. To check it out, we’re sending a craft called New Horizons—which is sure to be voted “Lamest Name for a Space Probe” someday—that should arrive in 2015. There have been new objects discovered there in recent years, and though it’s extremely cold that far from the sun, it’s been at the center of one of the most heated debates in astronomy.