Very Large Telescope
|Very Large Telescope|
The four Unit Telescopes that form the VLT together with the Auxiliary Telescopes
|Organization||European Southern Observatory (ESO)|
|Location||Paranal Observatory, Atacama desert, Chile|
|Weather||>340 clear nights/year|
|Wavelength||300 nm – 20 μm (visible, near- and mid-infrared)|
|First light||1998 (for the first Unit Telescope)|
|Diameter||4 x 8.2-metre Unit Telescopes (UT), plus 4 x 1.8-metre moveable Auxiliary Telescopes (AT)|
|Website||Very Large Telescope|
The VLT consists of four separate telescopes, each with a main mirror 8.2m across. They are often used separately, but they can be used together to get a very high angular resolution. The observatory also has four movable Auxiliary Telescopes (ATs) of 1.8 m aperture.
The VLT operates at visible and infrared wavelengths. Each individual telescope can detect objects roughly four billion times fainter than can be seen with the naked eye. When all the telescopes are combined, the facility can achieve an angular resolution of about 0.001 arc-second. This is equivalent to roughly two metres at the distance of the Moon.
Among the pioneering observations carried out using the VLT are the first direct image of an exoplanet, the tracking of individual stars moving around the supermassive black hole at the centre of the Milky Way, and observations of the afterglow of the furthest known gamma-ray burst.
Auxiliary Telescopes[change | edit source]
References[change | edit source]
- "The Very Large Telescope". ESO. http://www.eso.org/public/teles-instr/vlt.html. Retrieved 2011-08-05.
- Trimble V. & Ceja J.A. (2010). "Productivity and impact of astronomical facilities: a recent sample". Astronomische Nachrichten 331 (3): 338. doi:10.1002/asna.200911339.
- "The Very Large Telescope — the world’s most advanced visible-light astronomical observatory handout". ESO. http://www.eso.org/public/products/brochures/vlt_handout/. Retrieved 2011-08-05.