Galaxies and Light Years Matching Assessment
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Questions and Answers

What is the speed at which light travels in space?

  • 285,000 miles/hour
  • 186,000 meters/sec (correct)
  • 5.5 miles/hour
  • 186,000 miles/sec

    • Which best explains why a sunset is an optical illusion?

  • It takes 8.4 minutes for the sunlight to reach Earth. (correct)
  • Sunlight reaches Earth instantaneously.
  • The Sun orbits Earth.
  • The Sun is a hologram.

    • A galaxy is made up of...

  • planets and moon that revolve around one star.
  • all of the stars in the universe.
  • billions of stars, gas, and dust held together by gravity. (correct)
  • two stars that circle each other.

    • Which object is over 8 light years away from the Sun?

    <p>Proxima Centauri</p> Signup and view all the answers

    Where does the Sun lie in the Milky Way Galaxy?

    <p>C</p> Signup and view all the answers

    Which evidence supports the location of the Sun in the Milky Way Galaxy?

    <p>Our Sun is 2/3 out on one of the arms.</p> Signup and view all the answers

    What is the reason for a black hole potentially being located at the center of a galaxy?

    <p>It has a strong gravitational pull that can hold stars together</p> Signup and view all the answers

    What makes an Elliptical Galaxy stand out from other types of galaxies?

    <p>It lacks well-defined spiral arms and is more rounded or oval-shaped</p> Signup and view all the answers

    How do scientists determine the distance to galaxies using light years?

    <p>By measuring the time taken for light to reach Earth from the galaxy</p> Signup and view all the answers

    What unique feature of the Milky Way Galaxy distinguishes it from other types of galaxies?

    <p>It contains our Solar System and is a spiral galaxy</p> Signup and view all the answers

    What role does the speed of light play in measuring astronomical distances in space?

    <p>It serves as a constant for calculating distances in light years</p> Signup and view all the answers

    What does a light year measure?

    <p>Distance light travels in one year</p> Signup and view all the answers

    What type of galaxy has no clear shape and is the result of two galaxies colliding?

    <p>Irregular Galaxy</p> Signup and view all the answers

    Where is our Sun located in the Milky Way Galaxy?

    <p>2/3 out on one of the arms of the Milky Way Galaxy</p> Signup and view all the answers

    In space, what is the speed at which light travels?

    <p>186,000 miles/sec</p> Signup and view all the answers

    What type of galaxy is oval-shaped and considered the most abundant in the universe?

    <p>Elliptical Galaxy</p> Signup and view all the answers

    Why is a sunset considered an optical illusion?

    <p>The atmosphere scatters sunlight, changing its color and position</p> Signup and view all the answers

    Study Notes

    Galaxies and Light Years

    • A light year is the distance light travels in one year.
    • Proxima Centauri is the closest star to our Sun, approximately 4.24 light years away.
    • The Milky Way is a Spiral Galaxy, characterized by its "arms" and dense center.

    Galaxy Types

    • Spiral Galaxy: has "arms" and a dense center, examples include the Milky Way.
    • Elliptical Galaxy: oval-shaped, most abundant in the universe, and has no clear shape.
    • Irregular Galaxy: has no clear shape, formed from the remains of two colliding galaxies.

    Our Sun and the Milky Way

    • The Sun is located 2/3 out on one of the arms of the Milky Way Galaxy.
    • The Sun is not at the center of the Milky Way Galaxy.

    Light and Speed

    • The speed of light in space is approximately 186,000 miles per second.
    • The speed of light is not 5.5 miles per hour or 285,000 miles per hour.

    Sunsets and Optical Illusions

    • A sunset is an optical illusion because it takes 8.4 minutes for sunlight to reach Earth.
    • Sunlight does not reach Earth instantaneously.

    Galaxy Composition

    • A galaxy is made up of billions of stars, gas, and dust held together by gravity.
    • A galaxy is not composed of planets and moon that revolve around one star, two stars that circle each other, or all of the stars in the universe.

    Distances and Objects

    • Proxima Centauri is over 4 light years away from the Sun.
    • The Sun's light takes 5.5 hours to reach Pluto.
    • Sirius A is a star that is more than 8 light years away from the Sun.

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    Description

    Test your knowledge on galaxies, light years, and celestial objects with this matching assessment. From identifying galaxy types to calculating the distance light travels in a year, this quiz will challenge your understanding of astronomical concepts.

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