Celestial Objects and Their Orbits

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Questions and Answers

If a celestial body composed primarily of ice and dust is observed with a highly elliptical orbit extending far beyond Neptune, what is it most likely to be classified as?

  • A natural satellite of Uranus
  • A comet originating from the outer solar system (correct)
  • An artificial satellite used for interplanetary communication
  • An asteroid within the asteroid belt

Why does a planet maintain its orbit around a star within a solar system?

  • Electromagnetic forces generated by the planet's core
  • The planet's initial velocity from its formation
  • Gravitational forces between the planet and the star (correct)
  • The pressure exerted by the solar wind on the planet's surface

What primarily distinguishes a natural satellite from an artificial satellite?

  • Whether it was created by humans (correct)
  • The shape of its orbit around a planet
  • The size and mass of the orbiting body
  • The composition of materials it is made from

Where would you most likely find an asteroid?

<p>In the asteroid belt between Mars and Jupiter (C)</p> Signup and view all the answers

If observations revealed a new structure containing a central star and several orbiting planets, how would this structure be classified?

<p>A solar system within a galaxy (C)</p> Signup and view all the answers

What is the defining characteristic of a galaxy?

<p>A massive collection of billions of stars (C)</p> Signup and view all the answers

How are galaxies arranged within the universe?

<p>They are scattered and separated by vast distances of empty space (D)</p> Signup and view all the answers

What is the correct sequence from smallest to largest?

<p>Planet, Solar System, Galaxy, Universe (D)</p> Signup and view all the answers

If a planet's orbit around its star were perfectly circular, how would this affect the planet's speed?

<p>The planet's speed would remain constant throughout its orbit. (C)</p> Signup and view all the answers

Which of the following statements accurately describes the relationship between stars and galaxies?

<p>Galaxies are structures consisting of billions of stars held together by gravity. (D)</p> Signup and view all the answers

Flashcards

What is a satellite?

Any object orbiting a planet.

What are natural satellites?

Satellites not made by humans; formed naturally.

What are artificial satellites?

Man-made satellites used for communication, telescopes, and other applications.

What is the Solar System?

A system of eight planets orbiting the Sun.

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What are asteroids?

Primarily rock and metal, mainly located between Mars and Jupiter.

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What are comets?

Primarily ice and dust with highly elliptical orbits.

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What are galaxies?

Massive collections of billions of stars.

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How are galaxies held together?

Held together by gravity with stars orbiting the center.

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What is the Universe?

Vast, mostly empty space containing galaxies.

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What are galaxies? Solar systems? Planets?

Collections of billions of stars. Consist of a central star orbited by planets. Can be orbited by satellites.

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