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Shadow Play [PDF]

open access: yes
Introduction: Everyone and everything has a shadow. Shadows illustrate how threedimensional objects can be viewed in two dimensions. Younger students can learn about the Sun’s relative motion in the sky as they experiment with shadows.McDonald ...
McDonald Observatory   +1 more
core  

Reflective Solar Cooker [PDF]

open access: yes
Introduction: This reflective solar cooker uses the Sun’s energy to cook marshmallows. The target cooking area is the space where the light concentration is greatest. Never look directly at the Sun! It could damage your eyes. Don’t allow the cooker to
McDonald Observatory   +1 more
core  

Equatorial Sundial [PDF]

open access: yes
Introduction: One of astronomy’s first tools to measure the flow of time, a sundial is simply a stick that casts a shadow on a face marked with units of time. As Earth spins, the shadow sweeps across the face.
Mcdonald Observatory   +1 more
core  

The Pierre Auger Cosmic Ray Observatory [PDF]

open access: yes, 2015
A. Aab   +499 more
semanticscholar   +1 more source

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