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Sat nav for interstellar voyagers?

Sat nav for interstellar voyagers? Creative commons imageCredit: wbchanlicensedfor reuse under CC BY-NC-SA 2.0/a>
Introductory Level Updated 02 May 2013
By Dr Andrew Norton
If you find yourself in an uncharted part of the Galaxy, how would you know which way home is?  
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Exoplanets

Exoplanets Copyrighted imageCredit: ESA - C.Carreau
Introductory Level Updated 14 Dec 2012
By Dr Andrew Norton
What can be learnt from observing exoplanets?     
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