Editors note: Meg Urry is the Israel Munson professor of physics and astronomy at Yale University and director of the Yale Center for Astronomy and Astrophysics. The opinions expressed in this commentary are solely those of the author. World-famous physicist Stephen Hawking recently said the world as we know it could be obliterated instantaneously.

Basically, we would be here one minute and gone the next.

Dont you love physics? When we speculate about catastrophes, we dont mess around.

The physics underlying this speculation is related to the Higgs particle, whose discovery was announced July 4, 2012, at the Large Hadron Collider, the worlds largest particle accelerator, in Geneva, Switzerland.

A leading physicist dubbed it the God particle a name I wish would disappear, as the particle and the laws of physics tell us nothing whatsoever about God, and God, if she exists, has not opined about the Higgs particle.

So, the simplified argument goes like something like this the Higgs particle pervades space roughly uniformly, with a relatively high mass about 126 times that of the proton (a basic building block of atoms). Theoretical physicists noted even before the Higgs discovery that its relatively high mass would mean lower energy states exist. Just as gravity makes a ball roll downhill, to the lowest point, so the universe (or any system) tends toward its lowest energy state. If the present universe could one day transition to that lower energy state, then it is unstable now and the transition to a new state would destroy all the particles that exist today.

This would happen spontaneously at one point in space and time and then expand throughout the universe at the speed of light. There would be no warning, because the fastest a warning signal could travel is also at the speed of light, so the disaster and the warning would arrive at the same time.

We know spontaneous events do happen. The universe began in a rapid expansion called inflation that lasted only a tiny fraction of a second. We owe our existence to that sudden event.

Spontaneous change is something you might have seen in chemistry class. Super-cooled water will rapidly crystallize to ice if you drop a snowflake into it, just as a salt crystal will grow when added to a supersaturated salt solution.

Back to the universe. Whether the existence of Higgs boson means were doomed depends on the mass of another fundamental particle, the top quark. Its the combination of the Higgs and top quark masses that determine whether our universe is stable.

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Will the God particle destroy the world?