laser broom
“Why will we use green lasers for starwisp and light sail propulsion? “Because stars aren’t green. Can’t be green, in fact, because a black-body spectrum that peaks in the green is broad enough that there’s plenty of other-colored light to make it not sum to green. That
Sunjammer Cup
The competitors in the Fourth Sunjammer Cup departed Sarpe orbit today. All the big names in interstellar sail racing were participating, of course: Silvy Janaris’s Silverstar; Taran Kalyn’s red-hulled Meteor; Sithry min Corahill’s Black Ice Mirror with its liquid sails; Sen Kal Ethran’s Pride of Meridia;