An abstraction depicting a surface dotted with pearl growths-ballsAn abstraction depicting a surface dotted with pearl growths-balls
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
Technological progress in space, pollution controlTechnological progress in space, pollution control
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. ).