A lone star travels at 1% of the speed of light.

 

The lone star CWISE J124909+362116.0 (or “J1249+36” for short) travels in the universe with extraordinary speed. This star may have been a member of the binary star system.  Astronomers suspect that the companion star in the system exploded as a supernova. This explosion drove the CWISE J124909+362116.0 to travel through the universe with extraordinary speed.  But that thing is not the only model, that could explain the fast-travelling star. 

Sometimes red dwarfs face the events that cause so-called super flare. Those superflares can act like rocket engines and change the red dwarf's trajectories. Also if the energy burst hits to star's atmosphere that can cause an energy impulse, that pushes the red dwarf into another trajectory. 

Red dwarfs are quite light objects and impacts with things like super Jupiters can also change a lonely red dwarf's trajectory. Cosmos is a strange place and there are lots of things that can affect red dwarfs. Things like gravity and other things are the things. That can cause upheavals, and destroy entire solar systems in less than a second. 

"Artist’s simulation of one possible explanation for CWISE J124909+362116.0’s speed. In this scenario, the L subdwarf may have been a part of a white dwarf binary system that ended with the white dwarf exploding into a supernova and ejecting the L subdwarf. Credit: W. M. Keck Observatory/ Adam Makarenko" (Keckobservatory.org/ Tracking a Lone Star Speeding Across the Milky Way)

This star tells us how dangerous the universe is. Maybe in the future, this kind of thing will travel into our solar system. And that could cause horrifying events in our solar system. We all heard rogue planets, that nova or supernova explosions threw away from their solar system. But that is the first time when the red dwarf star starts to travel around the universe. This star tells lots of things about cosmic eruptions. 

Things like radio, and other radiation bursts that hit stars or icy dwarf planets like Pluto can push those kinds of objects out of their trajectories. When a high-power energy burst hits the icy gas, it can vaporize the gas. That thing turns gas into the rocket engine, that pushes the dwarf planet out from its course. In the same way, high energy bursts like antimatter impact can cause asymmetry in the red dwarf's energy production. 

https://www.keckobservatory.org/cwise/