Something in the shape of a mushroom with a predominance of red on a black backgroundSomething in the shape of a mushroom with a predominance of red on a black background
Beautiful outer space with galaxies and constellationsBeautiful outer space with galaxies and constellations
A satellite above the surface of a celestial body. view from spaceA satellite above the surface of a celestial body. View from space
Two wide filamentous yellow ribbons on a blue background with light blue bubblesTwo wide filamentous yellow ribbons on a blue background with light blue bubbles
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. ).