Æthelgrum

The Æthelgrum is Espa's home galaxy. It is a SB(s)m type irregular dwarf galaxy, which is 9.7 billion years old and contains billions of stars.

The Æthelgrum its basically a flat disk which has 1 strong bar with a stubby spiral arm, its rotation speed is roughly 90 km/s.

Tonya Expanse
The Tonya Molecular Cloud Complex is a vast disperse cluster of Nebula in the Æthelgrum which is hundreds of light-years across. Espa in the Axel system is located just outside it.

The Æthelgrum has a larger companion galaxy roughly half its size known as the Nyhstum.