Still, it is sufficiently close to be gravitationally bound to the other members.

Despite their wide separation, the two stars appear to be gravitationally bound, as they share a common proper motion.

The two stars share a common proper motion and hence are probably gravitationally bound to each other.

The two stars share a common proper motion, indicating they may be gravitationally bound.

There is a 12th magnitude star close to the other three, but it is not gravitationally bound to the system.

All the stars of this group share a roughly common motion through space, although they are not gravitationally bound.

If they are gravitationally bound to each other, it requires a minimum of 120,000 years to complete an orbit.

The stars are not gravitationally bound to each other as they are at different distances from the Earth.

The original list ended at 12 with most identified as gravitationally bound in a binary or multiple star system.

Stars can form part of a much larger gravitationally bound structure, such as a star cluster or a galaxy.

Still, it is sufficiently close to be gravitationally bound to the other members.

Despite their wide separation, the two stars appear to be gravitationally bound, as they share a common proper motion.

The two stars share a common proper motion and hence are probably gravitationally bound to each other.

The two stars share a common proper motion, indicating they may be gravitationally bound.

There is a 12th magnitude star close to the other three, but it is not gravitationally bound to the system.

All the stars of this group share a roughly common motion through space, although they are not gravitationally bound.

If they are gravitationally bound to each other, it requires a minimum of 120,000 years to complete an orbit.

The stars are not gravitationally bound to each other as they are at different distances from the Earth.

The original list ended at 12 with most identified as gravitationally bound in a binary or multiple star system.

Stars can form part of a much larger gravitationally bound structure, such as a star cluster or a galaxy.