Stargazing in a Cloudy Sky – Fulldome View of VLT
All Sky View | Atmospheric & Optical phenomena | By Year: 2016 | Chile | Clouds and Fogs Heavens | ESO Photo Ambassador | Moonlight Scenes | Professional Observatories in the World | Southern Hemisphere | Stargazing the night sky | Stars and Constellations | VLT
In this fish-eye fulldome picture, we can see a girl stargazing in a partial cloudy sky, that can promote sometimes the appearance of a beautiful show. Specially, if we have a night of Moonlight that can illuminate and show a strange game of ghostly shapes in the clouds. In the background a starry shy sky is showing a strong presence of reddish airglow. In the foreground, we also can see three of four movable Auxiliary Telescopes availabe in the Very Large Telescope plataform.
The Very Large Telescope (VLT) is a telescope operated by the ESO – European Southern Observatory on Cerro Paranal in the Atacama Desert of northern Chile. The VLT is the world’s most advanced optical instrument, consisting of four Unit Telescopes with main mirrors of 8.2m diameter, which are generally used separately but can be used together to achieve very high angular resolution. The four separate optical telescopes are known as Antu, Kueyen, Melipal and Yepun, which are all words for astronomical objects in the Mapuche language, with optical elements that can combine them into an astronomical interferometer (VLTI), which is used to resolve small objects. The interferometer is complemented by four movable Auxiliary Telescopes (ATs) of 1.8 m aperture. The 8.2m diameter Unit Telescopes can also be used individually. With one such telescope, images of celestial objects as faint as magnitude 30 can be obtained in a one-hour exposure. This corresponds to seeing objects that are four billion (four thousand million) times fainter than what can be seen with the unaided eye. The telescopes can work together, to form a giant ‘interferometer’, the ESO Very Large Telescope Interferometer, allowing astronomers to see details up to 25 times finer than with the individual telescopes. The light beams are combined in the VLTI using a complex system of mirrors in underground tunnels where the light paths must be kept equal to distances less than 1/1000 mm over a hundred metres. With this kind of precision the VLTI can reconstruct images with an angular resolution of milliarcseconds, equivalent to distinguishing the two headlights of a car at the distance of the Moon.
Image taken taken in 16/10/2015 from Cerro Paranal, Atacama desert, Chile.
