The Hubble telescope documents three big moons crossing the surface of Jupiter at the same time, an event that won't be repeated for another 17 years.
원문출처 : http://edition.cnn.com/2015/02/06/tech/hubble-jupiter-three-moons/index.html?eref=edition
원문출처 : http://edition.cnn.com/2015/02/06/tech/hubble-jupiter-three-moons/index.html?eref=edition