A raw spectrum obtained with FORS

A long, narrow slit isolates a small strip of sky. On this image, the slit is vertical. The spectrograph then splits the light from the slit into its individual colours, each point of the slit forming a horizontal rainbow. In this spectrum, the light from a distant galaxy appears as a faint horizontal line, peppered with bright dots corresponding to the colours emitted by the gas in the galaxy.

Credit:

ESO

About the Image

Id:fors2_spectrum
Type:Observation
Release date:9 April 2014, 11:42
Size:2036 x 2068 px

About the Object

Name:FORS2
Type:• Unspecified : Technology : Observatory : Instrument
• X - Paranal

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2.5 MB
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Colours & filters

BandTelescope
Very Large Telescope
FORS2

 

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