A ridge of islands stretches in the blue waters of the oceanA ridge of islands stretches in the blue waters of the ocean
Black constellations of the galaxy with blue lightBlack constellations of the galaxy with blue light
Annotation with a blue contrasting flame on a black backgroundAnnotation with a blue contrasting flame on a black background
The asteroid belt consists of small and large meteorite fragmentsThe asteroid belt consists of small and large meteorite fragments
Система знаний о закономерностях в развитии природы, общества и мышления, а также отдельная отрасль таких знаний. То, что поучает, даёт опыт, урок (в 4 знач.; разг. ).