Teleskop i venusskin
Planeten Venus skinner i aftenlyset over ESOs Paranalobservatorium i Chile på dette billede, som er taget af ESO Photo Ambassador Petr Horálek. Teleskopet i forgrunden er Very Large Telescopes Auxiliary Telescope 1, med kuplen åben og parat til at studere nattehimlen, når de smukke farver på himlen er forsvundet.
ESOs Very Large Telescope (VLT) består af fire 8,2m Unitteleskoper og fire 1,8m Auxiliary Telescopes (AT'er) som det på billedet. Det lys, som teleskoperne fanger ind kan kombineres, og anlægget danner så det, som kaldes VLT Interferometer (VLTI). Ved at samle lyset fra flere af teleskoperne, placeret forskellige steder på observatorieområdet på bjergtoppen, giver VLTI astronomerne mulighed for at se detaljer, som er 25 gange finere, end hvis man kun brugte eet af teleskoperne.
I et indviklet system af underjordiske tunneler samles lysstrålerne, og de skal gøres nøjagtigt ens indenfor 1/1000 mm over en afstand på 100 meter. Med den utrolige nøjagtighed kan man med VLTI danne billeder med en vinkelopløsning på millibuesekunder - svarende til at kunne skelne de to forlygter på en bil på Månens afstand.
Kilde:P. Horálek/ESO
Om billedet
| Id: | potw1808a |
| Sprog: | da |
| Type: | Foto |
| Udgivelsesdato: | 19. februar 2018 06:00 |
| Størrelse: | 5472 x 3648 px |
Om objektet
| Navn: | Auxiliary Telescopes |
| Type: | Unspecified : Technology : Observatory : Telescope |
Billedformater
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