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Astronomy Essentials

Short Answer


What does the Universe include?


What is the Big Bang?


How long ago did the Universe form?


Explain why the galaxies are moving outward.


If you had a spaceship that could move at the speed of light, could you visit another galaxy?  Explain!


What is astronomy?


Which six planets did the ancients know about?  Why did they not know about the other three planets?


Why was astronomy important to the ancients?


What did the ancients use when studying the sky?


Who was the first astronomer to use a telescope?


Why did sailors use the stars and not the planets to find their way at sea?


Why did the Greeks call some stars planetes?


Galileo, Kepler, and Copernicus believed in which model of the solar system?


Explain the difference between the heliocentric and geocentric models of the solar system.


Explain how our ideas about the solar system have changed over the last 2,000 years.


Who came up with the Scientific Method and what is it?


Aristotle and Ptolemy believed what about the solar system?


Why did it take so long for people to accept the heliocentric model of the solar system instead of the geocentric model?


How has technology helped change our ideas about the Universe?


What is the name of the telescope that orbits the Earth?


Galaxies are made up of what?


Astronomers classify galaxies on the basis of what?


Why do we use scale models while studying astronomy?


There are how many types of galaxies and what are their names?


The oldest stars are found in what type of galaxy?


Explain what a nebula is and why is it important?


Describe the Milky Way Galaxy and tell where our solar system is located.


Correctly identify each of these three galaxies.
A. sa028-1.jpg B. sa028-2.jpg
C. sa028-3.jpg

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