NASA’s Hubble Space Telescope took a photo of four moons
of Saturn passing in front of their parent planet.
NASA’s Jet Propulsion Laboratory, Pasadena, Calif.
ハッブル宇宙望遠鏡(Hubble Space Telescope)
reference
http://spacefellowship.com/News/?p=8458
http://www.afpbb.com/article/environment-science-it/science-technology/2583517/3927263