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 (B)</p> Signup and view all the answers

What was the Crab Nebula formed from?

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

Which of the following statements about protostars is true?

<p>Not all protostars will become stars (B)</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 (D)</p> Signup and view all the answers

What is the significance of the Crab Nebula?

<p>It is a well-known supernova remnant (C)</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 (D)</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 (B)</p> Signup and view all the answers

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

<p>Supernova (A)</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. (D)</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. (B)</p> Signup and view all the answers

What is the defining characteristic of a protostar?

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

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

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

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

<p>Size (A)</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 (C)</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 (C)</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 (B)</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 (A)</p> Signup and view all the answers

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

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

What is the defining characteristic of protostars?

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

What is the reason behind the formation of protostars?

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

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