Garnet A

Garnet A (ガーネットA, Gānetto A) is a red giant star about 30 light years from the Tau system, and is located in the Constellation Antares.

Details
Garnet A is a star which is nearing the end of its life and has engulfed several planets as it expanded. The system used to be a habitable zone, but now only unmanned observation stations are present in the area.

History
During the last days of the War of Independence, the Stellar Alliance developed the Stellar Slayer, using Garnet A as a power source for the test weapon. However, with their enemies closing in, they decided to use the weapon in a different way. They intended to use it to make Garnet A explode in a supernova, devastating everything within 50 light years. The Colony Federation's navy and privateers moved to stop them and a battle ensued over Garnet A. During the battle, one of the Original Seven, the Kurotori, was lost, it was later known that Kurotori survived and performed a hyperspace jump when falling into Garnet A, and fooled both factions into believing it was destroyed.

Three Ships Arc (Novel-Only)
Many years later, a supposed distress signal from the Kurotori would bring the Bentenmaru , Barbaroosa and Odette II to the system, and a conflict would occur due to a group that wanted to acquire the Stellar Slayer for their own ends.

Trivia

 * Garnet is a type of gemstone.