Yuan-Sen Ting takes us into deep space to show how astronomers study the stars beyond our reach. [4:46]

In 1955, the US and the USSR each announced plans to launch a satellite into orbit. Thus began the race to the moon. Throughout the 1960s and 1970s, the American space program and its new classes of astronauts achieved breakthroughs in...

The purpose of this lesson is to teach middle schoolers about how a spacecraft gets from the surface of the Earth to Mars. The lesson first investigates rockets and how they are able to get us into space. Finally, the nature of an orbit...