MOS observation of spiral galaxy NGC 4303

The very efficient multi-object-slit observing technique with the multi-mode instrument FORS1 is demonstrated on the Virgo cluster galaxy NGC 4303. Nineteen moveable slits at the instrument focal plane are positioned so that the faint light from several H II regions in this galaxy can pass into the spectrograph, while the much stronger "background" light (from the nearby areas in the galaxy and, to a large extent, from the Earth''s upper atmosphere) is blocked by the mask.

Credit:

ESO

About the Image

Id:eso0223b
Type:Observation
Release date:23 August 2002
Related releases:eso0223
Size:2076 x 2073 px

About the Object

Name:Messier 61, NGC 4303
Type:• Local Universe : Nebula : Appearance : Emission : H II Region
• Local Universe : Galaxy : Type : Spiral
• X - Galaxies
Distance:40 million light years

Image Formats

Large JPEG
1.9 MB
Screensize JPEG
701.0 KB

Wallpapers

1024x768
630.7 KB
1280x1024
1004.0 KB
1600x1200
1.3 MB
1920x1200
1.5 MB
2048x1536
2.1 MB

Colours & filters

BandTelescope
Optical Very Large Telescope
FORS1

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