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The solar system. The Sun is a star. All the planets go around it. That movement is called an orbit.

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To orbit means to go around something.

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The planets. There are eight planets in our solar system.

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Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

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All of them orbit the Sun. The Sun is a star. The Sun is in the centre of the solar system.

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All the planets go around it. The Sun gives us light and heat.

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Earth. We live on the planet Earth. The Earth is spherical, round, and has water and land.

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Thanks to water and air, there is life on our planet.

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The moon. The moon is a satellite. It orbits around Earth. It takes about 28 days to go all the way around. That's why we see it differently each night.

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Its phases are new moon, first quarter, full moon, last quarter, rotation, day and night.

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Earth spins around itself. This movement is called rotation and it lasts one day, 24 hours.

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This causes day and night.

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Revolution

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The seasons

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The Earth also goes around the Sun.

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This movement is called revolution and it takes 365 days, one year.

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Thanks to Revolution we have the seasons

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Spring, Summer, Autumn, Winter