When matter is emitted at speeds approaching the speed of light, these jets are called relativistic jets.

Because of the enormous amount of energy needed to launch a relativistic jet, some jets are thought to be powered by spinning black holes.

In many cases, accretion discs are accompanied by relativistic jets emitted along the poles, which carry away much of the energy.

Blazars are believed to be an active galaxy with a relativistic jet that is pointed in the direction of the Earth.

This ejects a relativistic jet which is responsible for emissions in the X-ray and radio wavelengths.

These relativistic jets can extend as far as many tens of kiloparsecs from the central black hole.

A part of the radio emission comes from relativistic jets, often showing apparent superluminal motion.

Microquasars are very important for the study of relativistic jets.

This high-energy, high-speed material, called radio or relativistic jets, can account for the radiation we observe.

From a supermassive black hole at its centre, a relativistic jet shoots out to an X ray hot spot 800,000 light years away.