Press enter or click to view image in full size (Image credit: Max Barry/Nation States) A simple way to distinguish a spacecraft from a rock is through its large non-gravitational acceleration. A natural icy rock like a comet is propelled by its mass loss. That mass loss can be observed through the cometary plume of gas and dust that surrounds …
Read More »Testing the Nature of 3I/ATLAS by Its Non-Gravitational Acceleration | by Avi Loeb | Aug, 2025
