Zeta Reticuli

It is located in the constellation Reticulum, and is visible to the unaided eye under very dark skies. Because of the southerly location of the system, it is not visible north of the tropics.


Characteristics
Originally thought to be old galactic halo Population II subdwarfs, the two stars are now thought to be younger galactic disk stars, but still considerably older than the Sun, perhaps as much as 8 billion years old.

Both stars share similar proper motions and distances confirming that they indeed form a wide binary star. The stars revolve around each other once in over a million years.