Alpha Leonis system
The Alpha Leonis system, also known as the Regulus system, was an inhabited planetary system in the Beta Quadrant. Notable forms of life in this system included the eel-birds of Regulus V and the Regulan bloodworms of Regulus II. (; ;  production art; ; ) The system was located three hundred light years from the Bajoran system. ()

History 
In 2154, a Vulcan High Command attack fleet massed in this system in preparation for an abortive preemptive strike against the Andorians. Regulus was the closest accessible star known to be outside the maximum range of Andorian Imperial Guard listening posts. ()

A century later, in 2254, Christopher Pike considered retiring and going into business on  or on the Orion colony. ()

In 2257, during the first , this system was occupied by the Klingons. () 

In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. This system's symbol had a blue color, indicating that it was affiliated with the . () 

In 2293, the location of Regulus in the Milky Way Galaxy was labeled in a star chart that was in Captain James T. Kirk's quarters aboard the . ( okudagram)

In 2366, this system was in need of medical supplies, which were transported there by the . ()

Prior to 2371, a science academy was founded on Regulus III. In the opinion of Commander Benjamin Sisko, the CO of Deep Space 9, this was a good school. ()

Appendices

Additional references

Background information 
The connection between the Alpha Leonis system and the star Regulus was established in the  episode .

According to Star Trek: Star Charts ("United Federation of Planets I", pp. 56, 61, and 62) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), in the late 24th century, the system was a destination on the major space lanes. The planets Regulus III and Regulus V were listed as Federation members.

Apocrypha 
According to the novelization of the episode  in Star Trek 1, the planet M-113 was the eighth planet in the system, Regulus VIII.

External links 
 
 

de:Regulanisches System
ja:しし座アルファ星系
nl:Alpha Leonis systeem
Star systems