The spacecraft is drifting too far off course! Two games help explain how a spacecraft can use its thrusters to maintain its position. The games have pupils be the components of vectors in order to create and counteract the...

Did the image I drew match the image you saw? By simulating a satellite and a ground station, teams of two transmit data in the form of pixels in order to recreate an image. They use four different levels of brightness, creating slightly...

In this worksheet on asteroids, students look at a picture asteroids and read accompanying facts, along with a brief paragraph.

Pictures and descriptions of the robot spacecraft that have explored the planets and outer space since the 1960s.

This is the homepage of all of the archived information about and from the Galileo Mission. Included is data from the flybys of Venus, Earth, Moon, and Asteroids Gaspra and Ida, as well as the current data from Jupiter and its moons. See...

Comet collision with Jupiter with lots of pictures and some text. Links to the information about the comet, the impacts, and observations made by four different spacecraft.

This asteroid fact sheet, supplied by the National Space Science Data Center, provides a table of information on selected asteroids, complete with commentary when appropriate.

A plethora of information about Asteroids. This site provides lots of in-text links to information, pictures of asteroids, a table full of information about asteroids, as well as links to more information about asteroids.

Here's a solved problem in time dilation. It's still not easy to follow, but it's doable. The math is not difficult, but the mathematical thinking is demanding.