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Challenge List:

Add the Micro to Gravity!
Launch Date: January 16, 2004
Take the PSA Microgravity Challenge! NASA challenges you to simulate microgravity on Earth.

Personal Satellite Assistant Earth to Orbit Engineering Design Challenge
Students take on a challenge similar to the one NASA engineers had to solve: they will use the forces produced by small fans to control the rotation of a horizontal, near frictionless wheel. The response of the wheel to these tiny forces is similar to objects in the microgravity environment of space. Students are given a set of pre-determined missions to accomplish with the wheel.
Watch the video: low bandwidth | high bandwidth
Earth to Orbit home page
PSA Earth to Orbit challenge

Robot Helper Design Challenge
Launch Date: March 1, 2003
Would you like to have your very own robot buddy that floats around and helps you out? Talks to you? Understands what you say? Finds the homework you lost? Scientists and Engineers at NASA are designing a robot to assist astronauts...