The VLT’s artificial star

This new image, taken by ESO Photo Ambassador Gianluca Lombardi, shows a stunning array of colours, ranging from the haze of pink dominating the bottom of the frame to the blues and whites of the Milky Way above. The blocks visible at the foreground of the image are the Unit Telescopes of the Very Large Telescope (VLT), based at ESO's Paranal Observatory in Chile.

Cutting through the scene is a harsh yellow slash. This prominent streak is the VLT's laser guide star, which is part of the telescope's adaptive optics system that compensates for the blurring effects of the atmosphere. Light from the sky is distorted as it travels through the atmosphere due to local variations. Whenever possible, astronomers hunt down a bright star to calibrate their observations, but when there is no suitable star near enough to their target, they have to rely on an artificial one — created by pointing a bright, piercing laser up into the night, as shown in this image.

Crediti:

ESO/G. Lombardi (glphoto.it)

A proposito dell'immagine

Identificazione:potw1425a
Tipo:Fotografico
Data di pubblicazione:Lunedì 23 Giugno 2014 10:00
Dimensione:5760 x 3840 px

A proposito delll'oggetto

Nome:Laser Guide Star, Paranal, Very Large Telescope
Tipo:Unspecified : Technology : Observatory : Telescope
Categoria:Paranal

Formati delle immagini

JPEG grande
6,4 MB

Zoom


Sfondi

1024x768
339,5 KB
1280x1024
541,8 KB
1600x1200
767,5 KB
1920x1200
905,2 KB
2048x1536
1,2 MB