From Andrew Ward, Wotton-under-Edge, Gloucestershire, UK
If aliens are flying Jupiter-mass spacecraft around the galaxy, surely we are more likely to detect the effects of the drive required to accelerate and decelerate such a large mass – which is likely to travel at a significant fraction of the speed of light – rather than the minuscule ripples in space-time generated by the moving craft?
Perhaps the fleeting alignment of such a spaceship drive with our telescopes explains something that we have already observed: gamma-ray bursts(17/24 December 2022, p 9).
