More than one billion people participate in Earth Day, making it the largest civic observance in the world. This year, make sure you join in on the action. Celebrated annually on April 22, Earth Day ...

Choose a telescope easy for a child to set up and use. Select a durable telescope that can withstand rough handling. Consider a simple telescope; complex ones can be discouraging. Prioritize a ...

The orbiting Kepler telescope is all about the numbers. How many stars have planets? How many have multiple planets? What sizes do they come in? How many of these planets are about the same size as ...