Quizlet astronomy exam 3

  • How big is the sun quizlet?

    Q) The Sun has a diameter of approx 1.4 million Kilometer..

  • How many stars are in the Milky Way astronomy quizlet?

    The Milky Way Galaxy is our galaxy.
    It is 160,000 light years in diameter and about 2000 light years think.
    It contains about 100 billion stars.
    We normally consider Deneb to be a bright but distant star at 1400 ly away from the Sun..

  • How many stars is the Milky Way home to quizlet?

    The Milky Way Galaxy is our galaxy.
    It is 160,000 light years in diameter and about 2000 light years think.
    It contains about 100 billion stars..

  • How much weaker is the gravitational pull of the Sun on Jupiter at 5 AU?

    Jupiter lies about 5 A.U. from the Sun, so at its distance: The Sun's gravity is 25 times weaker than its pull on the Earth..

  • A planet's orbital speed changes, depending on how far it is from the Sun.
    The closer a planet is to the Sun, the stronger the Sun's gravitational pull on it, and the faster the planet moves.
    The farther it is from the Sun, the weaker the Sun's gravitational pull, and the slower it moves in its orbit.
  • Jupiter lies about 5 A.U. from the Sun, so at its distance: The Sun's gravity is 25 times weaker than its pull on the Earth.
  • The Orion Nebula, also known as M42, is a diffuse nebula situated south of Orion's Belt in the constellation of Orion.
    It is one of the brightest nebulae, and is visible to the naked eye in the night sky.
Study with Quizlet and memorize flashcards containing terms like The asteroid is located between what?, Asteroids which travel about the Sun in Jupiter's  ,What is the average length of time from one maximum in the number of sunspots on the Sun to the next maximum? 11 years.
Who discovered that the Sun rotates 

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