Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- Bessel, Friedrich Wilhelm 1784-1846. Prussian astronomer who recalculated the orbit of Halley's comet (1804), verified by parallax the distance from Earth to the twin star 61 Cygni (1838), and developed a class of mathematical functions based on his study of planetary perturbation.
WordNet 3.0
- n. German mathematician and astronomer who made accurate measurements of stellar distances and who predicted the existence on an 8th planet (1784-1846)
Examples
“The trick is not to use a standard laser beam, but rather one known as a Bessel beam, that has a precise pattern of peaks and troughs in its intensity.”
“The secret is the use of what are known as Bessel beams recently highlighted in a report detailing how lasers can be used as "tractor beams".”
“There were, however, no oscillations to and fro, such as Bessel had seen and speculated upon in 1835.”
A Popular History of Astronomy During the Nineteenth Century Fourth Edition
“Since then there have also been Max Hastings's "Armageddon" (2004) and Gregor Dallas's "1945: The War That Never Ended" (2005), as well as academic studies by Richard Bessel, Toby Thacker, William Hitchcock and David Stafford—to name but a few works.”
“I have also worked with artists such as Ajith Bhaskaran Dass, Bragha Bessel, CV Chandrasekar, Mythili Prakash and Harikrishna Kalyanasundaram, who are outstanding dancers and teachers themselves.”
The Huffington Post: Nina Vir: Spotlight on Kasi Aysola: Classical Indian Dancer
“This binary system of two orange dwarf stars is famous for being the first star ever to have its distance measured by F Bessel in 1838.”
“Friedrich Bessel had proposed its existence back in 1844, but this was the first visual confirmation.”
Weekend SkyWatcher's Forecast: January 29-31, 2010 | Universe Today
“Unfortunately, this may also create problems because we may perceive danger even where little exists or become overly reactive to perceived slights, making ourselves hard to be around or even driving a situation toward problems. (see Bessel van der kolk)”
Dr. Tian Dayton: Adult Children of Alcoholics ACoAs: Qualities and Traits
“A perfect non-diffracting beam requires infinite energy and again cannot be made, but approximations to Bessel beams will propagate over appreciable distances without significant diffraction.”
“The spherical primary physics is perturbed in a Bessel series of polynomials of higher order terms.”
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