Chal, which means Heaven, was a Klingon planet with few land masses present. It was in a binary star system which contained an incansdescent plasma bridge that joined the twin suns.

The inhabitants were a unique hybrid civilization of Klingon and Romulans who were genetically engineered. This race was known as the Chalchaj 'qmey. (TOS novel: The Ashes of Eden)

In the novel it is stated that Chal means heaven, which agrees with the tlhIngan Hol definition meaning "sky". ^{[citation needed]}

planets visited by the USS Enterprise (NCC-1701-A)
Earth • wishing planet • Gamma Trianguli VI • Christophi IX • Sector 9 Romulan colony • Miraud • Triaminus IV • Endicor • Omicron Ceti IV • Chapin I • Nimbus III • Casmus III • Chronian III • New Brinden • Tau Gamma II • Claneia I • Karimea • Datugad • Needra • Dinar IV • Lerik IV • Rura Penthe • Khitomer • Prestor V • Chal