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bay

Overview page. Subjects: Architecture.

[Ge]

Structural division in the length of a building or roof. The unit within a building between a pair of piers or buttresses; the division of a roof marked by its main trusses.

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See overview in Oxford Index

Bayer, Johann (1572–1625)

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 63 words.

In his star atlas *Uranometria (1603) he allocated Greek letters to the main stars in each constellation, usually in order of brightness, and this system of Bayer letters has persisted. He...

Baily’s beads

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 69 words.

A phenomenon seen immediately before or after totality in a solar eclipse, when sunlight shines through valleys along the Moon’s limb. The appearance is like a curved string of pearls. It...

Bayer letters

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 34 words.

The system of identifying stars in a constellation by Greek letters according to their approximate order of brightness. They were introduced in ...

Baily, Francis (1774–1844)

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 98 words.

In 1826 he produced a catalogue containing highly accurate positions for 2881 stars. His published account of an annular eclipse he observed from Scotland in ...

Yerkes Observatory

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 81 words.

The observatory of the University of Chicago at Williams Bay, Wisconsin, on the shores of Lake Geneva, at an altitude of 330 m. It was founded in ...

Uranometria

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 83 words.

The first star atlas to cover the entire sky, published in 1603 by J. *Bayer. Each constellation was depicted on a page of its own, with star positions from the catalogues of ...

sinus

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 84 words.

An indentation in the edge of high ground on the surface of a planet or satellite; pl. sinūs. The name, which means ‘bay’, is not a geological term but is used in the nomenclature of...