Extraterrestrial Nanolaser Transceivers Voting: +2
Summary: Fire self-aligning nano-lasers at near the speed of light to create a 'fiber optic' channel reaching to nearby another star.
Today, nanolasers are small, like 35nm each (see link). As a receiver, put a photo-sensor of the same size. Attach a battery and counterweight with a tiny computer to adjust directions. Envelope in omnidirectional photosensor matrix. Test. Mass produce. Create a linear magnetic accelerator in space. Release. Use as a communication channel for any miro-sized probe travelling in parallel. Enjoy hi-res pictures of planets nearby another star.
This idea should be under a goal of reaching other star systems, under space travel category.