Do gravity holes harbour planetary assassins?

They are the places gravity forgot. Vast regions of space, millions of kilometres across, in which celestial forces conspire to cancel out gravity and so trap anything that falls into them. They sit in the Earth's orbit, one marching ahead of our planet, the other trailing along behind. Astronomers call them Lagrangian points, or L4 and L5 for short.
Gravity holes are weird regions of our solar system where gravity is cancelled out. They could harbour a dangerous secret.

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