article_snippet.sent: our sun is located in the suburbs of our galaxy, about two-thirds of the way out from the centre.
article_snippet.sent: Spitzer circles our sun, and is currently about 128 million miles (207 million km) away from Earth. 
article_snippet.sent: That's farther from Earth than Earth is from our sun.
article_snippet.sent: We've mainly explored We own solar neighborhood so far,' said Sebastiano Calchi Novati, a Visiting Sagan Fellow at Nasa's Exoplanet Science Institute. '