Lesson plan
Angular diameter distance
In astronomy, angular diameter distance is a distance (in units of length) defined in terms of an object's physical size (also in units of length), x , and its angular size (necessarily in radians), \theta , as viewed from Earth: d_A= \frac{x}{\theta}
Article summary
In astronomy, angular diameter distance is a distance (in units of length) defined in terms of an object's physical size (also in units of length), x , and its angular size (necessarily in radians), \theta , as viewed from Earth: d_A= \frac{x}{\theta}
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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