MAXI J1820+070 is a point source of X-rays, although it appears to be larger than a point source because it is much brighter than the jet sources.
The southern jet was too faint to be observed in the May and June 2019 observations.
From Earth’s perspective, the northern jet appears to be moving at 60 percent the speed of light (186,282 miles per second).
However, the southern one is travelling at an impossible-sounding 160 percent of light speed.
This is an example of superluminal motion, a phenomenon that occurs when something travels towards us near the speed of light, along a direction close to our line of sight.