The Theme of the Super Cross-Sectionality

Astrophage's ability to interact with all matter and energy, defying physics, is a key mystery.

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The Impenetrable Barrier

The Absorbing Shield The Opaque Microbe Grace finds that Astrophage is opaque to all wavelengths of light, even gamma rays. This is impossible according to known physics. The microbe absorbs everything. The Super Cross-Sectionality Lokken explains that this property is called 'super cross-sectionality'. It means nothing can quantum tunnel through a live Astrophage. This is why it is such an effective shield. The Application This property is used to line the Hail Mary's hull with Astrophage, protecting the crew from radiation. The super cross-sectionality is a key to the mission's success.

The Vulnerability

The Needle Poke The Simple Weakness Grace discovers that a live Astrophage can be killed by a simple physical puncture. The super cross-sectionality ceases when the cell is damaged. This is a vulnerability. The Death of the Shield Once dead, the Astrophage becomes transparent and loses its protective properties. This is used in experiments to study its internal structure. The Balance The microbe's strength is also its weakness. The theme of super cross-sectionality is a double-edged sword: it provides protection but also makes the microbe vulnerable to physical attack.

During Grace's early experiments

When Grace kills an Astrophage