Star Formation
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Questions and Answers

What is the Crab Nebula?

  • A protostar collapsing into a brown dwarf
  • A supernova remnant formed from an exploding star in 1054 (correct)
  • A planetary nebula formed from a dying low-mass star
  • A nebula where new stars are being born

    • What is a protostar?

  • A collapsed gas cloud that may become a star
  • A type of nebula where stars are born
  • A star in its final stages of life
  • A star that has not yet achieved nuclear fusion (correct)

    • What happens if a protostar runs out of material before achieving nuclear fusion?

  • It will continue to collapse indefinitely
  • It will become a brown dwarf (correct)
  • It will become a neutron star
  • It will become a black hole

    • Which of the following is NOT a characteristic of a protostar?

    <p>It is a celestial object between a planet and a star</p> Signup and view all the answers

    What was the Crab Nebula formed from?

    <p>A supernova explosion in 1054</p> Signup and view all the answers

    Which of the following statements about protostars is true?

    <p>Not all protostars will become stars</p> Signup and view all the answers

    What is the difference between a protostar and a brown dwarf?

    <p>A protostar is a stage in the formation of a star, while a brown dwarf is not</p> Signup and view all the answers

    What is the significance of the Crab Nebula?

    <p>It is a well-known supernova remnant</p> Signup and view all the answers

    What is the primary difference between a nebula and a protostar?

    <p>A nebula is a cloud of gas and dust, while a protostar is a collapsing sphere of gas</p> Signup and view all the answers

    What is the first step in forming a star?

    <p>The collapse of a gas cloud into a protostar</p> Signup and view all the answers

    What celestial event led to the formation of the Crab Nebula?

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

    What is the role of Chinese astronomers in the history of the Crab Nebula?

    <p>They documented its formation from a supernova in 1054.</p> Signup and view all the answers

    What happens if a protostar does not become large enough to achieve nuclear fusion?

    <p>It evolves into a brown dwarf.</p> Signup and view all the answers

    What is the defining characteristic of a protostar?

    <p>It is still undergoing gravitational compression.</p> Signup and view all the answers

    What celestial event led to the formation of the Crab Nebula?

    <p>A supernova explosion</p> Signup and view all the answers

    What is the primary difference between a protostar and a brown dwarf?

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

    What is the role of Chinese astronomers in the history of the Crab Nebula?

    <p>Documented the supernova that created the Crab Nebula</p> Signup and view all the answers

    Why might a protostar never become a star?

    <p>It doesn't become large enough to achieve nuclear fusion</p> Signup and view all the answers

    What is a common fate for protostars that do not achieve nuclear fusion?

    <p>Becoming a brown dwarf</p> Signup and view all the answers

    What is the significant milestone in a protostar's development when it becomes a star?

    <p>Development of nuclear fusion in its core</p> Signup and view all the answers

    What class of celestial objects is a brown dwarf placed between?

    <p>Planet and star</p> Signup and view all the answers

    What is the defining characteristic of protostars?

    <p>'Gravitational glow' from collapsing gas</p> Signup and view all the answers

    What is the reason behind the formation of protostars?

    <p>Gas collapse under gravitational forces.</p> Signup and view all the answers

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