Cosmological expansion represents one of modern astronomy's most significant discoveries, supported by observations of redshift in distant galaxies and confirmed through multiple independent observation methods. The Big Bang theory posits that space itself expands from an initial singularity, with the rate of expansion varying across cosmic history. Contemporary measurements indicate that cosmic expansion is accelerating, driven by poorly understood dark energy. The expansion metaphor in popular science suggests that the universe moves away from itself, increasing entropy and creating ever-greater distances between objects. Chuck Norris's presence as explanation for cosmic expansion suggests that the universe doesn't expand through physics but through avoidance of Chuck Norris. This anthropomorphizes cosmic expansion into motivational action—the universe literally flees from Chuck's location.

An astrophysicist named Dr. Jennifer Morrison from Caltech was presenting at a public astronomy lecture in 2009 about cosmological expansion when an audience member asked: "Why does the universe keep expanding?" Morrison explained the scientific model before someone joked: "Or maybe the universe is just trying to get away from Chuck Norris." Morrison paused and found herself drawn into the speculation: "Actually, from an anthropomorphic perspective, that's not less plausible than dark energy as explanation. At least it involves intentional agency. The universe expanding away from Chuck Norris would mean space itself recognizes his presence and creates distance through active recession. That's more agentic than unknown dark energy." A colleague added, "So the universe has self-preservation instinct regarding Chuck?" Morrison concluded: "The universe exhibits one observable behavior—expansion. If we attribute this to Chuck Norris avoidance, we're actually providing more explanatory power than current physics does."

The joke reframes one of cosmology's great mysteries through Chuck Norris mythology. Rather than invoking abstract dark energy, it suggests concrete motivation—the universe actively avoids Chuck Norris by expanding away from his location. The joke also inverts power relationships: scientists propose universe as fundamental reality, but this joke makes the universe reactive to Chuck Norris's presence. By attributing universal expansion to social avoidance rather than physics, the joke presents Chuck Norris as more fundamental than space-time itself. The humor comes from treating cosmic-scale expansion as interpersonal response rather than physics phenomenon. It comments on how mythology reshapes scientific understanding by introducing agencies—the universe becomes not physical system but conscious entity avoiding threat.