The Very Large Telescope Interferometer

The Very Large Telescope Interferometer (VLTI) consists in the coherent combination of the four VLT Unit Telescopes and of the four moveable 1.8m Auxiliary Telescopes. Once fully operational, the VLTI will provide both a high sensitivity as well as milli-arcsec angular resolution provided by baselines of up to 200m length.

Last Breaking News
	Call for Phase-A Proposals for 2nd generation VLTI instruments: Deadline January 30, 2006
	ESO Press Release 06/05 VLTI First Fringes with two Auxiliary Telescopes
	ESO Press Release 27/04Young Stars Poised for Production of Rocky Planets.VLT Interferometer Studies the Inner Region of Circumstellar Discs
	ESO Press Release 25/04: Measuring Cosmic Distances with Stellar Heart Beats; VLTI Watches the Changing Size of Bright Southern Cepheids
	ESO Press Release 01/04: First Auxiliary Telescope for the VLT Interferometer Installed at Paranal. (30/January/2004).
	Biggest Star in Our Galaxy Sits within a Rugby-Ball Shaped Cocoon: VLT Interferometer Gives Insight Into the Shape of Eta Carinae
	Scientific Data from MIDI and AMBER science demonstration are available
	ESO Press Release 17/03 (19 June 2003): A First Look at the Doughnut Around a Giant Black Hole - First detection by infrared interferometry of an extragalactic object.
	ESO Press Release 14/03 (11 June 2003): Flattest Star Ever Seen - VLT Interferometer Measurements of Achernar Challenge Stellar Theory. With PR Photos 15a-c/03.
	ESO Press Release 11/03 (13 May 2003): Sharper and Deeper Views with MACAO-VLTI - First Light" with Powerful Adaptive Optics System for the VLT Interferometer. With PR Photos 12a-j/03.
	ESO Press Release 25/02: New Vistas Open with MIDI at the VLT Interferometer: "First Fringes" in Mid-Infrared Spectral Region with Two Giant Telescopes (18/December/2002).
	ESO Press Release 22/02: How Small are Small Stars Really? VLT Interferometer Measures the Size of Proxima Centauri and Other Nearby Stars (29 November 2002).
	Public Release of Scientific Data from VLTI Commissioning
	ESO Press Release 16/02: Four Eyes Are Better. VLT Interferometer Passes Another Technical Hurdle. (26/September/2002).

The Very Large Telescope Interferometer

General Description and tutorials

Science with the VLTI

Main VLTI Sub-Systems

VLTI Instruments

Publications

Staff

Interferometry in the Community