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Vista blue and green auroras

Two polar bears look at the moon

A glowing planet in motion

A Glowing Planet in motion

Space travel through light years

Windows zipper in dark color

Moon. the galaxy. blue. planets

Moon. The galaxy. Blue. Planets

The hunger games and the flame will break out movie

The Hunger Games And the Flame will Break Out movie

Stylized skeleton of an adult

Galactic cosmic sky in bright colors

Star wars fantasy planet

Star Wars Fantasy Planet

Fantasy picture fusion of water and flame energy

The moon and the sun - a fascinating cosmos

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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. ).