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Date Taken:

November 20, 2019

Photograph By:

Mike Lucibella, NSF

License Type:

Public Domain

The South Pole Telescope is silhouetted by the sun and surrounded by a faint halo, an atmospheric effect from sunlight shining through ice particles suspended in the atmosphere. The extremely thin, dry air at more than 9,000 feet of elevation make for excellent observing conditions in the microwave band even during the 24-hour daylight of summer.

The South Pole Telescope (SPT) measures the cosmic microwave background (CMB) radiation. The project's goal is to detect all galaxy clusters in this region of the sky through the spectral distortion they impart on the CMB. Visit the Antarctic Sun to learn more.

Associated Keywords

NSF, Public Domain, SPT, Sundog, Telescope

By downloading this image, you agree to be bound by the terms and conditions of the image license.

This photo is in the public domain.

Photos whose copyright has expired or were taken by government employees as part of their job duties are considered to be in the public domain. Public domain works are not subject to copyright laws. Anyone may download these photos and use them freely, even for commercial purposes.

Attribution is not legally required for public domain photos but is strongly recommended.

This photo is covered by a Creative Commons license. Please see the Usage and Submissions page for more information. Use of this photo requires the following:

(1.) The user must give appropriate credit to the photographer and the National Science Foundation (NSF) and provide a link to the Creative Commons license. (2.) Use of the photo must be for non-commercial purposes only. (3.) No derivative works may be made with the original photo without the explicit permission of the photographer.

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