Where is the astronaut?

Subject: Where is the astronaut?

Date: Sun Jun 22 18:46:58 2008
Posted by Ron
Grade level: teacher/prof School: Penn State Erie, The Behrend College
City: Erie State/Province: PA Country: USA
Area of science: Physics
ID: 1214185618.Ph

Message:


An astronaut leaves earth at a velocity near the speed of light.  By my clock 
on earth he travels for 20 years. By his clock only 3.  Then he stops.  Since 
he travelled at a 70% of the speed of light for 20 years, I think he is at 
point A.  Since he travelled for 3 years at that speed, he thinks he is at 
point B. Where is he?

Re: Where is the astronaut?

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