Pronunciation: [d͡ʒˈɔːd͡ʒ bˈɪdɛl ˈe͡əɹi] (IPA) 
Correct spelling for the English word "george biddell airy" is [d͡ʒˈɔːd͡ʒ bˈɪdɛl ˈe͡əɹi], [dʒˈɔːdʒ bˈɪdɛl ˈeəɹi], [dʒ_ˈɔː_dʒ b_ˈɪ_d_ɛ_l ˈeə_ɹ_i] (IPA phonetic alphabet).
George Biddell Airy (1801-1892) was an English mathematician and astronomer known for his significant contributions in the fields of astronomy, optics, and mathematics. He served as the seventh Astronomer Royal of the Royal Observatory in Greenwich, England, from 1835 until his retirement in 1881.
Airy made significant improvements to the mathematical theory of optics, including suggesting an aberration-free design for lenses known as the "Airy disk." This theoretical work had practical applications in astronomical telescopes and microscopes, improving their efficiency and accuracy.
In addition to his work in optics, Airy was responsible for the establishment of a systematic method for measuring the Earth's density through observations of gravitational pull and the shape of the Earth. He also played a vital role in standardizing the measurement of time by making recommendations for establishing the Greenwich Mean Time (GMT) and introducing the transit circle and altazimuth instruments.
Throughout his career, Airy received numerous honors and awards, including being knighted in 1872 for his contributions to science. He published over 600 scientific articles and was an esteemed member of various scientific societies, including the Royal Society. Airy's work and influence continue to resonate in the fields of astronomy, optics, and mathematics, making him a prominent figure in the scientific community of his time and beyond.
