File:Venus shines on.tif
Original file (5,472 × 3,648 pixels, file size: 26.97 MB, MIME type: image/tiff)
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Summary
[edit]DescriptionVenus shines on.tif |
English: This image, taken by ESO Photo Ambassador Petr Horálek, shows the planet Venus shining brightly over ESO’s Paranal Observatory in Chile at twilight. The featured telescope is the Very Large Telescope’s Auxiliary Telescope 1, open and preparing itself to observe the night sky, which is splashed in shades of blue and orange.
ESO’s Very Large Telescope (VLT) comprises four 8.2-metre Unit Telescopes, and four 1.8-metre Auxiliary Telescopes (ATs) — like the one posing in the foreground of the image — whose captured light can be combined to form the VLT Interferometer (VLTI). By combining the light from multiple telescopes positioned in different places across the observatory site, the VLTI allows astronomers to see details up to 25 times finer than with the individual telescopes. The light beams are then combined using a complex system of mirrors in underground tunnels where the light paths must be kept equal to distances less than 1/1000 mm over a hundred metres. This unbelievable technology means the VLTI can reconstruct images with an angular resolution of milliarcseconds — equivalent to distinguishing the two headlights of a car at the distance of the Moon.中文(简体):ESO摄影师彼得霍勒雷克拍摄的这张照片显示,在黄昏时分,智利帕瑞纳天文台的天空上闪耀着金星。图中的望远镜是VLT(甚大望远镜)的一个辅助望远镜,它正在打开它的罩子准备观察夜空。
ESO的甚大望远镜(VLT)包括四个8.2米口径的单位望远镜和四个1.8米口径的辅助望远镜(AT)——就像图中的那个小望远镜一样。它们可以组合成VLT干涉仪(VLTI干涉仪)。通过将位于天文台各处不同位置的多台望远镜相结合,VLTI使天文学家能够看到比单独一个望远镜更精细25倍的细节。 在地下隧道中使用复杂的反射镜系统将光束组合在一起,其中光路必须等于小于1/1000毫米的距离。 这种令人难以置信的技术意味着VLTI可以以毫秒的角分辨率区别天体——相当于在月球的距离上区分汽车的两个大灯。 |
Date | |
Source | http://eso.org/public/images/potw1808a/ |
Author | P. Horálek/ESO |
Licensing
[edit]This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
This file is licensed under the Creative Commons Attribution 4.0 International license.
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon EOS 6D |
Exposure time | 3/10 sec (0.3) |
F-number | f/4.5 |
ISO speed rating | 250 |
Date and time of data generation | 2015:01:26 01:06: |
Lens focal length | 70 mm |
Width | 5,472 px |
Height | 3,648 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 15 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CC (Windows) |
File change date and time | 19:19, 19 June 2015 |
Exposure Program | Manual |
Exif version | 2.3 |
Date and time of digitizing | 2015:01:26 01:06: |
APEX shutter speed | 1.736966 |
APEX aperture | 4.33985 |
APEX exposure bias | 0 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Spot |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Focal plane X resolution | 1,520 |
Focal plane Y resolution | 1,520 |
Focal plane resolution unit | 3 |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Manual white balance |
Scene capture type | Standard |