![]() ![]() Why infrared? This kind of light, with a longer wavelength than the visible (up to 40 times longer), propagates much better through dust clouds, allowing astronomers to study remarkable objects and processes like the formation and evolution of the stars, the stellar wind, molecular clouds and protostars that would otherwise hidden behind the clouds. This instrument was installed on the VLT in 2004, and it can study the infrared light from celestial objects. The VLT Imager and Spectrometer for mid-InfraRed or VISIR is one of the tools that astronomers use to get around this problem. That means that the light that your eyes can see is absorbed by the dust, leaving astronomers working in visible light blind, with no information to analyse from these regions. The truth is that many of these dark areas are no more than dusty zones blocking the visible light coming from the stars. Is there something out there? Or are there just empty black spaces between the stars?įor years, astronomers have wondered the same thing. ![]() Take a few minutes to look at the night sky on a dark night and you will notice that there are several huge black areas in the Milky Way. ![]()
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