Earth Moon Sun Light and Dark on the Moon

Front

Celestial Object Noun

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[suh-les-chul ob-jekt]

Back

Celestial Object

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A natural object existing in space outside of Earth's atmosphere, such as a planet, moon, star, or the Sun.

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Example: The Moon orbits Earth due to gravity, illustrating a celestial object in space.

Front

Illuminate Verb

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[ih-loo-mi-neyt]

Back

Illuminate

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To supply with light or to light something up, making it visible to an observer.

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Example: The Sun illuminates the Earth and Moon, making them visible.

Front

Pattern Noun

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[pat-ern]

Back

Pattern

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A repeating arrangement or sequence of events or objects that can be observed and used to make scientific predictions.

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Example: A repeating arrangement of shapes shows how patterns form in mathematics.

Front

Model Noun

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[mod-l]

Back

Model

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A representation of a system or object that helps us understand something by making it simpler or easier to see.

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Example: This image models the Earth-Moon system, showing gravity's role in the Moon's orbit.

Front

Simulation Noun

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[sim-yoo-ley-shuhn]

Back

Simulation

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A computer program that imitates a real-world system or process, often used to gather evidence and answer questions.

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Example: A flight simulator imitates real-world flying to train pilots safely.

Front

Scale Noun

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[skeyl]

Back

Scale

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The relative size or distance of objects in a model when compared to the actual objects in the real world.

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Example: A scale model of a town shows how buildings and roads are proportionally reduced in size compared to real life.

Front

Eclipse Noun

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[ih-klips]

Back

Eclipse

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An astronomical event that occurs when one celestial object moves into the shadow of another, temporarily blocking its light.

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Example: The image shows a lunar eclipse where the Earth blocks sunlight from reaching the Moon, creating a shadow.

Front

Axis Noun

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[ak-sis]

Back

Axis

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The imaginary line around which a celestial body, such as a planet or moon, rotates or spins.

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Example: Earth's rotation axis creates day and night by dividing the planet into illuminated and shadowed areas.

Front

Orbit Noun

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[awr-bit]

Back

Orbit

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The curved path that a celestial object or spacecraft follows as it revolves around another object in space.

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Example: The image shows Earth orbiting the Sun, illustrating the curved path Earth follows in space.

Front

Intensity Noun

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[in-ten-si-tee]

Back

Intensity

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The measurable amount, concentration, or strength of something, such as light or energy, in a specific area.

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Example: Sunlight intensity decreases as it spreads from the Sun to Earth and the Moon.