Convert angstrom to astronomical unit
Please provide values below to convert angstrom [A] to astronomical unit [AU, UA], or Convert astronomical unit to angstrom.
How to Convert Angstrom to Astronomical Unit
1 A = 6.68458712226845e-22 AU, UA
Example: convert 15 A to AU, UA:
15 A = 15 × 6.68458712226845e-22 AU, UA = 1.00268806834027e-20 AU, UA
Angstrom to Astronomical Unit Conversion Table
| angstrom | astronomical unit |
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Angstrom
The angstrom is a unit of length equal to 10⁻¹⁰ meters. It is not an SI unit.
History/Origin
In 1868, Swedish physicist Anders Jonas Ångström created a chart of the spectrum of sunlight in which he expressed the wavelengths in multiples of one ten-millionth of a millimeter. The unit was named after him.
Current Use
The angstrom is used to express the sizes of atoms, molecules, and the wavelengths of electromagnetic radiation, particularly in the fields of chemistry, spectroscopy, and crystallography.
Astronomical Unit
The astronomical unit is a unit of length, now defined as exactly 149,597,870,700 meters. It is approximately the average distance between the Earth and the Sun.
History/Origin
Historically, the astronomical unit was the mean Earth-Sun distance. In 2012, the International Astronomical Union (IAU) redefined it as a fixed constant.
Current Use
The astronomical unit is used primarily for measuring distances within the Solar System or around other stars.