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Abstraction: winter patterns and snowflakes

A girl in a red fantasy dress

Planet earth in outer space

Planet Earth in outer space

Parabolic antennas are directed into space

Shooting star- making a wish

Shooting Star- making a wish

Saturn. rings of saturn. space

Saturn. Rings of Saturn. Space

Fantasy battle in space

Fantasy art green dragon

The galaxy. the bright light of the planet

The galaxy. The bright light of the planet

A close-up shot of a christmas tree

A close-up shot of a Christmas tree

Astronomical stars in the vastness of the galaxy

A futuristic city in the darkness of the evening

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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. ).