Description:
 

In this demonstration, the effect of stars appearing to twinkle is explored and explained.

 


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Description:

This is a demonstration that shows what retrograde motion looks like and describes the mechanism behind it.


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Description:

This is a simple demonstration of parallax that can be performed easily in the classroom. 

 


 

 

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Description:

    Sunspots appear as dark spots on the surface of the sun, even though they are at temperatures of thousands of kelvin. This demonstration shows this phenomenon in the classroom.

 


Description:

This demonstration uses simple classroom tools to show how atmospheric scattering changes the colour of the light from sun during a sunset.

 


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Read more: Why Are Sunsets Red?