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.
Oikeudet:ESO/M. Hayes
Kuvasta
Tunnistus: | eso1013a |
Tyyppi: | Havainto |
Julkaisupäivä: | 24. maaliskuuta 2010 19:00 |
Vastaavat julkaisut: | eso1013 |
Koko: | 1787 x 1787 px |
Kohteesta
Nimi: | GOODS South field |
Tyyppi: | Early Universe : Galaxy : Grouping : Cluster |
Etäisyys: | z=2.2 (punasiirtymä) |
Constellation: | Fornax |
Kategoria: | Galaxy Clusters |
Taustakuvat
Koordinaatit
Position (RA): | 3 32 32.74 |
Position (Dec): | -27° 47' 20.40" |
Field of view: | 7.47 x 7.47 arcminutes |
Suuntaus: | Pohjoinen on 44.4° vasen pystysuuntaan nähden |
Värit ja suotimet
Kaista | Aallonpituus | Teleskooppi |
---|---|---|
Optinen Ly-alpha | 390 nm | Very Large Telescope FORS1 |
Optinen H-alpha | 2.1 μm | Very Large Telescope HAWK-I |