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Using stellar 'twins' to reach the outer limits of the galaxy
A new method of measuring the distances between stars enables astronomers to climb the 'cosmic ladder' and understand the processes at work in the outer reaches of the galaxy.
'Hedgehog' robots hop, tumble in microgravity
Cassini's final breathtaking close views of dione
Dawn sends sharper scenes from Ceres
Hubble survey unlocks clues to star birth in neighboring galaxy
'Littlest' quark-gluon plasma produced: State of matter thought to have existed at birth of the universe
Comet hitchhiker would take tour of small bodies