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Circumpolar - hemisphere sud - Dawn and evening twilights reflected on the AAT dome -...
IMAGE
number
PIX4581086
Image title
Circumpolar - hemisphere sud - Dawn and evening twilights reflected on the AAT dome - Photographic pose of 6 hours during a summer night, around the south Celeste pole. Siding Spring's 3.9m telescope dome in the foreground. From a truly dark site like Siding Spring, Australia, the duration of star trail exposures is governed only by the length of the night. The shortest nights are in December, at the height of summer, when it is truly dark for a little over six hours. “True darkness” for astronomers is defined as the period between “” astronomical twilights” when the sun is 18 or more degrees below the horizon. This exposure was a little over six hours long on one December night, and the AAT dome reflects both the evening twilight on the west (right) of the dome and the morning twilight from the eastern glow on the left
Circumpolar - hemisphere sud - Dawn and evening twilights reflected on the AAT dome - Photographic pose of 6 hours during a summer night, around the south Celeste pole. Siding Spring's 3.9m telescope dome in the foreground. From a truly dark site like Siding Spring, Australia, the duration of star trail exposures is governed only by the length of the night. The shortest nights are in December, at the height of summer, when it is truly dark for a little over six hours. “True darkness” for astronomers is defined as the period between “” astronomical twilights” when the sun is 18 or more degrees below the horizon. This exposure was a little over six hours long on one December night, and the AAT dome reflects both the evening twilight on the west (right) of the dome and the morning twilight from the eastern glow on the left
Personal Prints, Cards, Gifts, Reference. Not for commercial use, not for public display, not for resale.
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$25.00
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Print and/or digital. Single use, any size, inside only. Single language only. Single territory rights for trade books; worldwide rights for academic books. Print run up to 1500. 7 years. (excludes advertising)
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Editorial (Books, magazines and newspaper) - extended
Print and/or digital. Single use, any size, inside only. Single language only. Single territory rights for trade books; worldwide rights for academic books. Print run up to 5000. 7 years. (excludes advertising)
eg: Illustrate the inside of a book or magazine with a print run of 5,000 units
