Scene Context: The crew of the Sagan receives a warning about an X-20 class solar event. The X-ray front has already reached the ship, and a stream of high-energy particles is approaching right behind it, forcing the crew to hide in the radiation shelter.
Essence of the Phenomenon: A powerful solar event consists of several effects, not just one. The flare emits electromagnetic radiation, particularly X-rays, which travel at the speed of light. Simultaneously, solar energetic particles (primarily protons) and a coronal mass ejection (CME)—a massive cloud of plasma—may occur. The X-ray radiation arrives first, followed later by the charged particles and plasma.
Scientific Basis: NOAA classification defines the X-class as the highest base class for flares; an X20 event corresponds to an extreme R5 radio blackout. Historically, events estimated even higher than X20 have been observed, though the largest flares can saturate instruments and require post-processing to estimate accurately.
Current Limitations: Modern technology cannot "deflect" such a particle stream with an active field on a compact spacecraft. The realistic defense strategy is not to stop the event, but to buy time and hide the crew in the best-shielded compartment. Even with a warning, the reaction window can be extremely short.
Theoretical Extrapolation: This scenario utilizes an extreme case: the ship gets only a few minutes between the X-ray warning and the arrival of the most dangerous part of the particle stream. This does not contradict the physical logic of the event but represents a deliberately dramatized upper limit of a "worst-case scenario," rather than a typical average event.