NASA spacecraft enters closest orbit of smallest ever object
NASA spacecraft OSIRIS-REx broke a space exploration record after it entered into closest-ever orbit of smallest-ever object, asteroid Bennu. OSIRIS-REx entered into the 492-metre-wide asteroid's orbit on Monday, 110 million kilometres away from Earth, and will circle around it about 1.75 kilometres from its centre. Earlier, European spacecraft Rosetta orbited 7 kilometres from comet 67P's centre.