Our place in the Universe (Astrophysics) - Geography

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12 Terms

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The Universe

The totality of all space, time, matter, and energy.

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What do some scientific theories suggest?

Our universe may be just one of many, forming part of a larger concept known as the multiverse, where different universes may operate under different physical laws.

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The Milky Way

A barred spiral galaxy containing over 100 billion stars.

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The solar system

Our local neighbourhood, defined by the Sun’s gravitational pull on 8 orbiting planets.

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Planet Earth

The 3rd planet from the Sun, uniquely tilted and shaped to support life.

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Sun (diameter)

1.39 million km

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Earth (diameter)

12,742 km

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Avg. distance from the Sun to Earth

149 million km (8.3 light-minutes)

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Jupiter (diameter)

139,820 km

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Pluto (diameter)

5,950 km

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How is Earth able to support life?

  • Its distance from the Sun allows for moderate temperatures.

  • It contains liquid water

  • It has an atmosphere that protects and sustains living organisms.

This unique balance is known as the Goldilocks Effect.

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Goldilocks zone

The range of distances from a star where a planet can have temperatures that allow liquid water to exist on its surface.