The M87 VLA radio jet combining all of the available frequencies (from 4 to 18 GHz). The top of the image, a), with an angular resolution of 0.″2 (robust = 1 weighted image), is sensitive to large-scale emission. It shows the well-known morphology consisting of a core, a highly collimated conical jet ending in a series of bright knots, and large extended lobes. The bottom image, b), has a higher angular resolution of 0.″09 (uniform weighted image), and it shows the structure of the collimated jet in great detail. Several knots, previously identified in optical images, are labeled. This image shows a clear double-helix structure in the conical jet.