Stars Trails over Armazones

Multiple-exposure picture taken looking west from the top of the 3060-metre-high Cerro Armazones, the selected site for the European Extremely Large Telescope (E-ELT). Because of the rotation of the Earth, the night sky is seen as it rotates around the southern celestial pole. As a result of this movement, the stars describe dotted trails when a series of exposures is combined. The closer we look to the celestial equator — here seen near the left edge of the picture — the straighter the trails appear. On the right of the image is the Differential Image Motion Monitor (DIMM), used to measure the atmospheric seeing.

Credit:

F. Char/ESO

About the Image

Id:armazones_20110122
Type:Photographic
Release date:6 July 2011, 10:52
Size:3072 x 2304 px

About the Object

Name:Cerro Armazones
Type:• Milky Way : Sky Phenomenon : Night Sky : Trail
• Unspecified : Technology : Observatory
• X - E-ELT

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