[kortilla]

There isn’t a way to use solar power for propulsion energy. The issue isn’t an electrical source, the problem is emitting mass.

[dragonwriter]

> There isn’t a way to use solar power for propulsion energy

That’s...demonstrated to be false.

https://en.m.wikipedia.org/wiki/Solar_sail

[bawolff]

What about a photon rocket? https://en.m.wikipedia.org/wiki/Photon_rocket

[jhgb]

Solar electric propulsion and solar thermal propulsion seem to work just fine.