Hercules A is a galaxy that hosts a gigantic black hole, a thousand times more massive than the black hole at the centre of our Milky Way galaxy.

From the central region are spewing two symmetrical jets of extremely hot gas, only visible in radio frequencies. These jets length is in the order of a million light-years.

The image is a combination of two different images. In white we see this part of the sky in the visible range of the spectrum of light, captured with the Hubble Space Telescope. In pink are represented the data in the range of the radio frequencies collected with the Very Large Array (VLA) radiotelescope.

In the analysis of these data, it was established that there hasn’t been a steady emission of the gas over time, but it has been episodic instead.

Galaxy chosen by Sonia Antón