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 |
Category: | Paranal |
Colours & filters
Band | Telescope |
---|---|
Very Large Telescope FORS2 |