The GOODS-South field
This composite image of the GOODS-South field — the result of an extremely deep survey using two of the four giant 8.2-metre telescopes composing ESO’s Very Large Telescope (VLT) and a unique custom-built filter — shows some of the faintest galaxies ever seen. It also allows astronomers to determine that 90% of galaxies whose light took 10 billion years to reach us have gone undiscovered.
The image is based on data acquired with the FORS and HAWK-I instruments on the VLT. It shows in particular two varieties of light emitted by excited hydrogen atoms, known as Lyman-alpha and H-alpha.
Crediti:ESO/M. Hayes
A proposito dell'immagine
Identificazione: | eso1013a |
Tipo: | Osservazione |
Data di pubblicazione: | Mercoledì 24 Marzo 2010 19:00 |
Notizie relative: | eso1013 |
Dimensione: | 1787 x 1787 px |
A proposito delll'oggetto
Nome: | GOODS South field |
Tipo: | Early Universe : Galaxy : Grouping : Cluster |
Distanza: | z=2.2 (redshift (spostamento verso il rosso)) |
Constellation: | Fornax |
Categoria: | Galaxy Clusters |
Coordinate
Position (RA): | 3 32 32.74 |
Position (Dec): | -27° 47' 20.40" |
Field of view: | 7.47 x 7.47 arcminutes |
Orientazione: | Il Nord è a 44.4° a sinistra della verticale |
Colori e filtri
Banda | Lunghezza d'onda | Telescopio |
---|---|---|
Ottico Ly-alpha | 390 nm | Very Large Telescope FORS1 |
Ottico H-alpha | 2.1 μm | Very Large Telescope HAWK-I |