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.

Kilde:

ESO

Om billedet

Id:fors2_spectrum
Type:Observation
Udgivelsesdato:9. april 2014 11:42
Størrelse:2036 x 2068 px

Om objektet

Navn:FORS2
Type:Unspecified : Technology : Observatory : Instrument
Kategori:Paranal

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Very Large Telescope
FORS2

 

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