MQNs are indestructible — they cannot be broken apart by any known process. But they are also extremely rare and, when streaming in from interstellar space, moving far too fast to collect with any current technology. The key to making MQNs accessible is aerocapture: slowing them down enough to be gravitationally bound to the solar system.
Even with a detection target as large as Earth's magnetosphere, the event rate may be marginal unless MQNs have first been accumulated in the solar system. This can happen when an MQN passes through the limb of the Sun's photosphere, losing enough energy to become gravitationally captured, and then scatters through the planetary gravitational field into progressively more stable orbits.
