Exploring the Universe

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Exploring the Universe – Ideas change the world.

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Over millions of years, humans have tried to make sense of the world around them, including the skies, space, and stars.

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The Big Bang theory states that the universe began as a single point and is still expanding today.

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Scientists have used new technologies to gather evidence to support the Big Bang theory.

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Ancient Greeks believed that Earth was stationary and was at the center of the universe.

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The Greeks theorized that all the planets, stars, and the Sun revolved around Earth. This is called the geocentric theory, and was widely accepted for almost 1,500 years.

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In the mid-16th century, an astronomer named Copernicus proposed the idea that Earth and other planets revolve around the Sun.

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This is called the heliocentric model. This model provided a reason for the apparent changes in the motion of the planets, which was not explained using the geocentric model.

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Science is ever evolving.

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The understanding of the universe is continually reshaped through new theories and technologies like telescopes, computers, and applications.

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Models of the universe

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This flashcard contains a diagram.

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Heliocentric

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The model of the solar system where the Sun is at the center.

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Geocentric

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The model of the solar system where the Earth is at the center.

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Levels of organization of the universe

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A. Universe, Solar System, Galaxy, Planet B. Planet, Solar System, Galaxy, Universe C. Planet, Galaxy, Solar System, Universe D. Universe, Galaxy, Solar System, Planet

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The picture shows a ring containing objects in space.

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The objects that MOST LIKELY make up the ring are comets, asteroids, meteorites, and meteoroids.