https://phys.org/news/2018-06-years-eye-aquarii.html

This system, known as R Aquarii for its apparent location in the large zodiacal constellation of Aquarius, is an important example of the effects of the gravitational interactions that occur between nearby stars. In the later stages of their evolution, when stars like the sun grow to giant dimensions, lowering the surface gravity and allowing prodigious amounts of matter to escape, the gravitational pull of a nearby star can become the dominant cause of their evolution and destiny. As shown by R Aquarii, matter lost by one star can be sculpted into complex, albeit symmetric, nebulae, and in the process, highly collimated outflows, called jets, can form. Jets are a common phenomenon in the universe, and are found around binary stars and black holes, as well as in the centres of the largest and most powerful galaxies.

R Aquarii is the closest-known stellar jet, allowing these complex physical processes to be studied in unprecedented detail. Given its proximity, it has been possible to follow the evolution of the nebula and its jet in real time by patiently obtaining sequence of images over many years. The study recently published in the journal Astronomy & Astrophysics used telescopes at the Roque de los Muchachos Observatory (Garafía, La Palma) and Chile over the course of more than 20 years.