The firs quasar 3C 273

The left image shows the deepest look yet into the plasma jet of the quasar 3C 273, which will allow scientists to further study how quasar jets are collimated, or narrowed. The powerful, collimated jet extends for hundreds of thousands of light-years beyond the host galaxy, as seen in the right panel image taken by the Hubble Space Telescope. Scientists use radio images at different scales to measure the shape of the entire jet. The arrays used are the Global Millimeter VLBI Array (GMVA) joined by the Atacama Large Millimeter/submillimeter Array (ALMA) and the High Sensitivity Array (HSA).
Credits: Hiroki Okino and Kazunori Akiyama; GMVA+ALMA and HSA images: Okino et al.; HST Image: ESA/Hubble & NASA.