When mighty tremors devastated her family estate, Astra realized the sphere was more than she had presumed. In imagining a breathtaking meteor shower, she had caused the world to shake from the impact of massive meteorites. Shivering with guilt and resentment, Astra destroyed the armillary sphere, knowing she could no longer use it to dream without consequence.
Astra is a feminine name of Old Greek origin with the meaning "star". Astrum (plural Astra) translates from Latin as "star, constellation; heavenly body; planet, sun, moon". Derived from Ancient Greek ἄστρον ástron or aster ("star").
An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (in the celestial sphere), consisting of a spherical framework of rings, centred on Earth, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic. As such, it differs from a celestial globe, which is a smooth sphere whose principal purpose is to map the constellations.
Artwork by Yu-Han Chen.