- #1

SAT2400

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**Relativity(Light years)??? PLEASE HELP!**

## Homework Statement

Imagine an astronaut on a trip to Siris, which is 8 light years from Earth. On arrival at Siris,

the astronaut finds that the trip lasted 6 years. If the trip was made at a constant speed of .8c, how can the 8 light year distance be reconciled with the 6 year duration?

## Homework Equations

E=mc^2

## The Attempt at a Solution

I don't know how to solve this question....8 light years-> 6 years. 3/.8c??

Please help!