 What is the Brightside?
Brightside Crossing by Alan E. Nourse JAMES BARON was not pleased to hear that he had had a visitor when he reached the Red Lion that evening. Across to the right was a group that Baron knew vaguely—Andean climbers, or at least two of them were. No human beings will ever cross the Brightside alive, not if they try for centuries.” After that, I followed Sanderson’s work in the Twilight Lab up there and began to get Brightside into my blood, sure as death. I first met him on Venus; we spent five years together up there doing some of the nastiest exploring since the Matto Grasso. I want the Brightside without any nonsense about it.” “I want to make a Crossing at perihelion and I want to cross on the surface.
 The Brightside is the side of Mercury that constantly faces the sun.
 The Brightside is the side of Mercury that constantly faces the sun.  The Brightside is the first passage to the core of Vulcan Crater on Venus.  The Brightside is the name of the passage on the Andean mountains of Venus.  The Brightside is the name of the crossing the climbers are going to climb.