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Hidden visions

Hidden visions Copyrighted image Credit: BBC
Introductory level Duration 5 mins Updated 03 Aug 2006
Abbe's mathematical research revolutionised photography and his philanthropy opened up opportunities for people who, like him, had humble beginnings.

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Telescopes and spectrographs

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Telescopes and spectrographs Copyrighted image Credit: Used with permission
Intermediate level Duration 10 hours Updated 27 May 2011
This unit looks at how telescopes and spectrographs are designed to improve our ability to observe the universe. You will examine how different...