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In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

In this activity, learners set up an experiment to investigate the effects of hot air on the path of a laser beam.

In this activity, learners observe colors in the flame of a burning candle to explore connections between matter, light, color and temperature -- basic concepts of matter and energy.

This fun hands-on astronomy activity uses a variety of simple props to help learners understand why they see what they see in a telescope.

This is a classic exercise for visualizing the scale of the Solar System.