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Star brightness and star distance: Difference between revisions
From OER in Education
Star brightness and star distance (view source)
Revision as of 19:01, 26 September 2012
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* how we use black body radiation to calculate the temperature of distant stars | * how we use black body radiation to calculate the temperature of distant stars | ||
|age=Secondary | |age=Secondary | ||
|content=In the 17th century, Christian Huygens discovered how to estimate how far away a star is. He made a series of smaller holes in a screen facing the sun, until he estimated the light was the same intensity as the star Sirius. Huygens' results were surprisingly accurate, but still wrong. This series of slides may inspire you to tell the remarkable story of how we measure stars. The teacher explains his approach in an audio file and provides a web link to an interactive tool used in the presentation. The presentation | |content=In the 17th century, Christian Huygens discovered how to estimate how far away a star is. He made a series of smaller holes in a screen facing the sun, until he estimated the light was the same intensity as the star Sirius. Huygens' results were surprisingly accurate, but still wrong. This series of slides may inspire you to tell the remarkable story of how we measure stars. The teacher explains his approach in an audio file and provides a web link to an interactive tool used in the presentation. The presentation has been converted to an alternative format. | ||
|format= | |format= | ||
|strategy= See the teacher's note on 'active-note taking' | |strategy= See the teacher's note on 'active-note taking' | ||
