Astronomy
A jet that seems faster than light
Aim a fast jet toward the observer. Compare its true speed with apparent motion and the brightening of the approaching side.
The model and its limits
Ballistic knots with special-relativistic aberration and a prescribed synchrotron spectral index of 0.7. Jet collimation and plasma dynamics are not solved.
Equations used in the module
Equations β_app = β sin θ/(1-β cos θ); δ = [γ(1-β cos θ)]^(-1)
