Space Exploration: Jovian and Terrestrial Planets
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Questions and Answers

What is a galaxy?

  • A cluster of asteroids and meteors in space
  • A group of terrestrial planets orbiting a star
  • A group of Jovian planets held together by gravity
  • A collection of gas, dust, and billions of stars held together by gravity (correct)

    • Why is the Milky Way Galaxy called the Milky Way?

  • Because it is made up of milk-like substances
  • Due to the abundance of milk-producing stars
  • It appears as a milky band of light in the sky (correct)
  • Because it contains a lot of dairy planets

    • Where is our Solar System located in the Milky Way Galaxy?

  • At the center of the galaxy
  • In a different galaxy altogether
  • On the outskirts of the galaxy (correct)
  • Within a cluster of asteroids

    • What is the approximate number of stars in the Milky Way Galaxy?

    <p>100 billion stars</p> Signup and view all the answers

    What is the primary function of the Sun in our solar system?

    <p>To maintain the orbits of the planets</p> Signup and view all the answers

    Which of the following is NOT a component of the solar system according to the text?

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

    What is the primary factor that drives the seasons, ocean currents, and weather on Earth?

    <p>The gravitational pull of the Sun</p> Signup and view all the answers

    Which celestial body is described as a hot ball of glowing gases in the text?

    <p>The Sun</p> Signup and view all the answers

    What are asteroids and comets considered to be?

    <p>Remnants from the formation of the solar system</p> Signup and view all the answers

    How are asteroids and comets compared to planets and moons?

    <p>They have remained largely unchanged over time</p> Signup and view all the answers

    What are comets made of when frozen?

    <p>Frozen gases, rock, and dust</p> Signup and view all the answers

    What is a meteoroid called when it survives the trip through the Earth's atmosphere and hits the ground?

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

    Define the Doppler Effect.

    <p>An apparent shift in frequency of a wave caused by relative motion between the source of the wave and the observer.</p> Signup and view all the answers

    What is the definition of Wavelength?

    <p>The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.</p> Signup and view all the answers

    Explain what Pitch refers to in the context of sound.

    <p>The highness or lowness of sound.</p> Signup and view all the answers

    What is Redshift and why is it significant?

    <p>Redshift is when light is shifted toward lower frequencies or the red end of the spectrum. It is significant in understanding the expansion of the universe.</p> Signup and view all the answers

    Define Blueshift and explain its importance.

    <p>Blueshift is when visible light is shifted toward higher frequencies or the blue end of the spectrum. It is important for analyzing wavelengths of light.</p> Signup and view all the answers

    What is the primary cause of Cosmological redshift?

    <p>The expansion of space.</p> Signup and view all the answers

    Explain the concept of Gravitational redshift.

    <p>Gravitational redshift occurs when light is shifted due to the massive amount of matter inside of a galaxy.</p> Signup and view all the answers

    What is the difference between Frequency and Wavelength?

    <p>Frequency is the rate at which a vibration occurs, while Wavelength is the distance between successive crests of a wave.</p> Signup and view all the answers

    How is Blueshift determined and what instrument is used for this purpose?

    <p>Blueshift is determined by studying the wavelengths of light. The instrument used for this purpose is a Spectrometer or spectrograph.</p> Signup and view all the answers

    What is the Doppler Effect?

    <p>The Doppler Effect is an apparent shift in frequency of a wave caused by relative motion between the source of the wave and the observer.</p> Signup and view all the answers

    Explain the concept of Wavelength.

    <p>Wavelength is the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.</p> Signup and view all the answers

    Define Pitch in the context of sound.

    <p>Pitch refers to the highness or lowness of sound.</p> Signup and view all the answers

    What is Redshift and how is it defined?

    <p>Redshift is the term used when light is shifted toward lower frequencies or toward the red end of the spectrum.</p> Signup and view all the answers

    Explain Blueshift and its significance.

    <p>Blueshift is the term used when visible light is shifted toward higher frequencies or toward the blue end of the spectrum.</p> Signup and view all the answers

    What is Cosmological redshift and what causes it?

    <p>Cosmological redshift is a redshift caused by the expansion of space.</p> Signup and view all the answers

    How is Blueshift determined and what instrument is used?

    <p>Blueshift is determined by the study of the wavelengths of light using a spectrometer or spectrograph.</p> Signup and view all the answers

    What are the three types of Redshift mentioned in the text?

    <p>The three types of Redshift mentioned are from the universe expansion, from the movement of galaxies relative to each other, and from gravitational redshift.</p> Signup and view all the answers

    Why is Blueshift not something you see with your eyes?

    <p>Blueshift is not something you see with your eyes because it is determined by the study of the wavelengths of light.</p> Signup and view all the answers

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