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In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.

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

In this activity, learners build a simple pinhole viewer. They use this apparatus to project images from a variety of light sources, including a candle, the Sun, and the Moon.

This fun, nighttime hands-on astronomy activity lets learners explore how long it takes for light from different objects in the universe to reach Earth.

In this activity, learners make a scale model of the Solar System and learn the real definition of "space." Learners use the online calculator to create an appropriate scale to use as a basis for thei

In this activity, learners make their own pinhole viewer in order to measure the size of the sun.

In this outdoor activity, learners search for the warmest and coolest, windiest and calmest, wettest and driest, and brightest and darkest spots in an area.

In this outdoor activity, learners use only their senses to to find the extremes of several environmental variables or physical factors: wind, temperature, light, slope and moisture.

In this outdoor, winter activity, learners find living green plants under the snow and determine the light and temperature conditions around the plants.

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

In this activity, learners explore how light and dark colored objects absorb the Sun's radiations at different rates.