Gradaxian

Gradaxian is the second planet in the Fauldro System. It is a barren, uninhabited planet in the Spiral Arm. The planet has the same gravity as Earth's, except its atmosphere is unbreathable to all life.

Stith, Akima, and Ishaq briefly visited the planet on the way to Fauldro. The three used the convenience of the planet's barrenness as a place for weapons training.

Behind the Scenes
The planet’s name is an amalgamation of the titular planet in Konami’s Gradius series of shoot ‘em up video games and Radaxian, the fictional home planet of Alex Kidd, the titular character of the Sega video game franchise of the same name and Sega’s previous mascot before Sonic the Hedgehog was introduced in 1991.