A tourist in the Southern Hemisphere would be puzzled by the sky. Looking north in search of the Big Dipper and the North Star yields no results. These trusty guides to all the familiar stars and constellations in the Northern Hemisphere are nowhere to be found.

Over in the northwest, there's a familiar sight: the belt of Orion. But it doesn't look quite right. The fuzzy patch that marks the Orion Nebula is above Orion's belt, instead of below. On closer inspection, Orion is completely upside down! Wait a minute, up is down?

Welcome to stargazing south of the equator.