Chapter 1 test
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the farthest bright galaxies that modern telescopes are capable of seeing are up to
10 billion light years away
suppose we imagine the sun to be about the size of a grapefruit. how big an area would the orbits of the nine planets of the solar system cover?
the size of a typical campus
earth is made mostly of metal and rocks. where did this material come from
it was produced by nuclear fusion in stars
what is nuclear fusion?
the process of combining lightweight nuclei to make heavier nuclei
one light-hour is the distance that light travels in a hour. how far is this, in kilometers?
1.08 billion km
suppose we look at the photograph of many galaxies. Assuming that all galaxies formed at about the same time, which galaxy in the picture is the youngest?
the one that is farthest away
which of the following statements does not use the term light year in an appropriate way
it will take me light years to complete this homework assignment
suppose we imagine the sun to be about the size of a grapefruit
earth is the size of a point about 15 meter away from the sun
What would you like to do?
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