Concentric Circles

In this eye-catching Picture of the Week, bright star trails fill the sky above ESO’s La Silla Observatory in Chile. Such trails are formed by the Earth spinning on its axis — our planet’s rotation causes the stars to seemingly move through the sky, slowly tracing out perfect concentric arcs and circles as they do so. A photograph like this therefore requires a long exposure to capture the passage of time.

At the centre of this image is the decommissioned Swedish-ESO Submillimetre Telescope , and the ESO 3.6-metre telescope sits atop the mountain to the left, aglow with activity. This telescope hosts HARPS (the High Accuracy Radial velocity Planet Searcher), which searches for exoplanets by measuring the tiny “wobbling” motions of their host stars as the planets sweep around in their orbits. 

Telif:

ESO/B. Tafreshi (twanight.org)

Görüntü Hakkında

Kimlik:potw2041a
Tür:Fotoğrafik
Yayın tarihi:12 Ekim 2020 06:00
Boyut:6144 x 4096 px

Nesne Hakkında

Adı:ESO 3.6-metre telescope, Swedish–ESO Submillimetre Telescope
Tür:Unspecified : Sky Phenomenon : Night Sky : Trail
Unspecified : Technology : Observatory : Telescope
Kategori:La Silla
Stars

Görüntü Türleri

Büyük JPEG
9,1 MB
Baskı JPEG
4,6 MB

Yaklaştırma


Duvarkağıtları

1024x768
520,9 KB
1280x1024
860,5 KB
1600x1200
1,2 MB
1920x1200
1,4 MB
2048x1536
1,8 MB