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.

Crédit:

ESO

À propos de l'image

Identification:eso0223b
Type:Observation
Date de publication:23 août 2002
Communiqués de presse en rapport:eso0223
Taille:2076 x 2073 px

À propos de l'objet

Nom:Messier 61, NGC 4303
Type:Local Universe : Nebula : Appearance : Emission : H II Region
Local Universe : Galaxy : Type : Spiral
Distance:40 million années lumière
Catégorie:Galaxies

Image Formats

Grand JPEG
1,9 Mio
JPEG taille écran
701,1 Kio

Fonds d'écran

1024x768
630,8 Kio
1280x1024
1004,1 Kio
1600x1200
1,3 Mio
1920x1200
1,5 Mio
2048x1536
2,1 Mio

Couleurs & filtres

DomaineTélescope
VisibleVery Large Telescope
FORS1