... ESO, the European Southern Observatory . ... Travel to E-ELT Armazones . ... ESOтАЩs New Technology Telescope (NTT) has been used to find the first evidence that asteroids can have a highly varied internal structure. By making exquisitely precise measurements astronomers have found that different parts of the asteroid Itokawa have different densities. ... At Paranal, ESO operates the Very Large Telescope, the worldтАЩs most advanced visible-light astronomical observatory and two survey telescopes. ...