The Reality Bomb is a device which is capable of dissolving all forms of matter within the universe (and other, parallel universes, even the Void itself).
The Reality Bomb does this in the following way:
Z-Neutrino energy is flattened by the perfect alignment of 27 specific planets which are in perfect sync with each other into a single stream, forming a wavelength which cancels out the electrical energy that binds the particles of all atoms in existence. This causes the structure of atoms to fall apart. The planets, being in the optimum pattern, then become a transmitter for this wavelength, causing it to erase all matter in the universe. If it is detonated within the Medusa Cascade (a rift in time and space), it will bounce back into every parallel universe, erasing them too. The wavelength cannot be stopped once it is transmitted, nor does it fade out. The Z-Neutrino energy must also originate at the centre of the planetary alignment field.
It was invented by mad Kaled scientist Davros, but it was countered by Donna Noble, when she closed all Z-Neutrino relay loops using an internalised synchronous back-feed reversal loop.
This device is fictional, created for the BBC tv show Doctor Who.
"People, planets and stars will become dust. And the dust will become atoms, and the atoms will become...nothing."
"Detonate the reality bomb!"
"Your strategies have failed, your weapons are useless, and...oh, the end of the universe has come."
"No, Davros! You can't!"