Abstract
Of all astronomical phenomena visible to the naked eye, none is as spectacular, or as fleeting, as a total eclipse of the Sun. For a few brief minutes, the Moon blocks the Sun’s blindingly bright photosphere to reveal the ethereal solar corona. This gossamer halo, forming the outer atmosphere of the Sun, can only be seen in the eerie twilight brought on by totality.
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Notes
- 1.
Actually, the elliptical orbits of Earth and the Moon cause small variations in the angular diameters of the Sun (0.524°–0.542°) and the Moon (0.490°–0.559°).
- 2.
The exposure value, or EV, is used to indicate an interval on the photographic exposure scale. A step of 1 EV corresponds to an exposure difference of 2 (one full f-stop).
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Espenak, F. (2013). Imaging and Processing Images of the Solar Corona. In: Gendler, R. (eds) Lessons from the Masters. The Patrick Moore Practical Astronomy Series, vol 179. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7834-8_14
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DOI: https://doi.org/10.1007/978-1-4614-7834-8_14
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