2 ms·

You might not need an engine on the craft, just a big reflector and a tightly focused beam on some planetary body that bombarded it with photons. The problem t

by avar 16y ago

You might not need an engine on the craft, just a big reflector and a tightly focused beam on some planetary body that bombarded it with photons. The problem then would be slowing down at the other end though.

hugh3 16y ago
Fire a mirror off ahead of you?
- Zaak 16y ago
  In the book Rocheworld, they do just that. The light sail splits in two, with the outer portion curving to reflect light from the propulsion laser back onto the inner portion to slow down the ship.