Such stars eventually settle down to a close binary with a distant companion, with the other star(s) previously in the system ejected into interstellar space at high velocities.

These stars eject matter into "empty" space, some at acoustic frequencies.

Instead, at the end of the asymptotic-giant-branch phase the star will eject its outer layers, forming a planetary nebula with the core of the star exposed, ultimately becoming a white dwarf.

Alpha Camelopardalis, a runaway star possibly ejected from this cluster.

The clash of this shock wave with the cloud of matter the star had been ejecting before it exploded is the source of the radio signal.

The star has ejected its outer layer which has left behind a smaller, hot star with a temperature on the surface of about 50,000 degrees Celsius.

This shape suggests that the star ejected material in two different outbursts in two distinct directions.

Hen 2-47 contains six lobes of gas and dust that suggest that the central star of the nebula ejected material at least three times in three different directions.

One possibility is that gravitational disturbances caused by massive planets or passing stars ejected the bodies from their home planetary systems.

Such stars may be ejecting high-velocity particles in the surrounding space, and when the particles slam into gas atoms, they could produce gamma rays.