- Aquila (constellation) (Wikipedia)
Aquila is a constellation on the celestial equator. Its name is Latin for ’eagle’ and it represents the bird that carried Zeus/Jupiter’s thunderbolts in Greek-Roman mythology.
- Siliceous rock (Wikipedia)
Siliceous rocks are sedimentary rocks that have silica (SiO2) as the principal constituent. The most common siliceous rock is chert; other types include diatomite. They commonly form from silica-secreting organisms such as radiolarians, diatoms, or some types of sponges.