Just after midnight on January 1st, a NASA spacecraft will whiz past the most distant space rock that’s ever been visited in our Solar System. This remote interplanetary flyby will be over in a blink. But if successful, the event could tell us a whole lot about the objects that dominate the far reaches of our cosmic neighborhood.
The robotic spacecraft making this daring visit is called New Horizons, and it’s been traveling through space for the last 13 years. You may remember this famous bot: it was the first human-made object to ever visit Pluto in the summer of 2015. Ever since that flyby, New Horizons has been plunging farther into the Solar System. Three years later, it’s ready to meet up with another faraway target, a rock...