File:ESOcast 13.webm

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Original file ‎(WebM audio/video file, VP8/Vorbis, length 5 min 33 s, 1,280 × 720 pixels, 1.93 Mbps overall, file size: 76.73 MB)

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English: In principle, the larger a telescope’s mirror, the finer the details it can see.

Continuing to increase the size of telescope mirrors is not an easy task, so astronomers have come up with a new technology to see even finer details: interferometry. This observational technique combines the light received by two or more telescopes and allows them to act as a single unit with a mirror diameter equivalent to the distance between the telescopes.

Engineers designed the VLT so that it can also be used as an interferometer. Along with the four 8.2-metre Unit Telescopes, four mobile 1.8-metre Auxiliary Telescopes (ATs) were included in the overall VLT concept to form the Very Large Telescope Interferometer (VLTI). The ATs can move between 30 different stations, and at present, the telescopes can form groups of two or three for interferometry.

Credit:Visual design and editing: Martin Kornmesser and Luis Calçada. Cinematography: Peter Rixner. Editing: Herbert Zodet. Web and technical support: Lars Holm Nielsen and Raquel Yumi Shida. Written by: Herbert Zodet, Henri Boffin and Adam Hadhazy. Host: Dr. J. Narration: Gaitee Hussain. Music: John Dyson from the CD darklight. Footage and photos: ESO. Directed by: Herbert Zodet. Executive producer: Lars Lindberg Christensen.
Date
Source ESOcast 13: A sharper view of the Universe with the VLT Interferometer
Author ESO
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Date/TimeThumbnailDimensionsUserComment
current10:12, 7 March 20185 min 33 s, 1,280 × 720 (76.73 MB)ComputerHotline (talk | contribs)Imported media from https://cdn.eso.org/videos/hd_and_apple/esocast13.m4v

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Format Bitrate Download Status Encode time
VP9 720P 1.42 Mbps Completed 06:36, 25 August 2018 10 min 36 s
Streaming 720p (VP9) 1.31 Mbps Completed 23:36, 16 March 2024 5.0 s
VP9 480P 711 kbps Completed 06:32, 25 August 2018 7 min 4 s
Streaming 480p (VP9) 608 kbps Completed 03:33, 6 February 2024 2.0 s
VP9 360P 435 kbps Completed 06:30, 25 August 2018 4 min 34 s
Streaming 360p (VP9) 332 kbps Completed 10:05, 7 February 2024 2.0 s
VP9 240P 286 kbps Completed 06:29, 25 August 2018 4 min 1 s
Streaming 240p (VP9) 183 kbps Completed 12:14, 17 December 2023 1.0 s
WebM 360P 559 kbps Completed 10:15, 7 March 2018 3 min 24 s
Streaming 144p (MJPEG) 824 kbps Completed 12:17, 9 November 2023 11 s
Stereo (Opus) 99 kbps Completed 06:41, 22 November 2023 5.0 s
Stereo (MP3) 128 kbps Completed 04:07, 2 November 2023 12 s

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