Convert Parsecs to Inches (pc to in) ▶
How to convert
1 inch (in) = 8.23158E-19 parsec (pc). Inch (in) is a unit of Length used in Standard system. Parsec (pc) is a unit of Length used in Metric system.
Inch: A Unit of Length Used in the US Customary SystemThe inch (in) is a unit of length used in the US customary system, which is one of the systems of measurement used in the United States and some other countries. The inch is equal to 1/12 of a foot or 2.54 centimeters. The inch is also a derived unit in the imperial system, which is the official system of measurement for the United Kingdom and some other Commonwealth countries. The symbol for inch is in or ″. The inch is used for measuring short distances and dimensions, such as the length of a nail or the width of a finger. The inch is named after the Latin word uncia, meaning one-twelfth. In this article, we will explore the definition, history, usage and conversion of the inch as a unit of length.
Definition of Inch
The inch is a unit of length that is equal to 1/12 of a foot. It is defined as 25.4 millimeters. The foot is defined as 0.3048 meters.
The definition of the inch has changed over time, as different standards and methods of measurement were developed by various countries and organizations. The current definition of the inch as based on millimeters was agreed upon by an international treaty in 1959.
History of Inch
The origin of the inch as a unit of length can be traced back to ancient times, when it was used as a measure of length based on the human body. The word inch comes from the Latin word uncia, meaning one-twelfth. It referred to one-twelfth of a Roman foot, which was about 29.6 millimeters.
The inch was also used as a measure of length by other civilizations, such as the Anglo-Saxons, who used it as one-third of a palm or one-twenty-fourth of an ell. The Anglo-Saxon inch was about 25 millimeters.
The inch was adopted by other countries that followed the English system of measurement, such as the United States and Canada. It was also incorporated into the imperial system, which was established by an act of Parliament in 1824. The imperial system was based on seven base units that could be derived from natural and traditional units. The inch remained as a derived unit in the imperial system, but it was no longer recommended for use in scientific and technical fields.
Usage of Inch
The inch is a unit of length that is used for measuring short distances and dimensions, such as the length of a nail or the width of a finger.
The inch is commonly used in everyday life, especially in countries that follow the US customary system. Some examples are:
The inch is also used in some scientific and technical fields, such as:
How to Convert Inch to Other Units of Length in the US Customary System
To convert inch to other units of length in the US customary system, we need to know the relationship between inch and other units. Here are some common units and their equivalent values in inches:
To convert inch to any of these units, we need to multiply or divide by the appropriate factor. For example, to convert 10 inches to feet, we need to divide by 12:
10 inches / 12 = 0.833 feet
To convert 10 inches to miles, we need to divide by 63,360:
10 inches / 63,360 = 0.000158 miles
To convert 10 inches to mils, we need to multiply by 1000:
10 inches x 1000 = 10,000 mils
How to Convert Inch to Other Units of Length in the SI System
To convert inch to other units of length in the SI system, we need to know the relationship between inch and meter. One inch is equal to 0.0254 meters.
To convert inch to any other unit of length in the SI system, we need to multiply or divide by the appropriate power of ten and add a prefix. Here are some common units and their equivalent values in inches:
To convert inch to any of these units, we need to multiply by the appropriate factor and add a prefix. For example, to convert 10 inches to centimeters, we need to multiply by 2.54:
10 inches x 2.54 = 25.4 centimeters
Parsec: A Unit of Length
A parsec is a unit of length that is often used in astronomy to measure the large distances to astronomical objects outside the Solar System. It is approximately equal to 3.26 light-years or 206,265 astronomical units (au), which are the average distances from the Earth to the Sun. One parsec is about 30.9 trillion kilometres or 19.2 trillion miles.
Definition of the parsec
The word parsec is a combination of “parallax” and “arcsecond”, which are terms related to the measurement of angles. Parallax is the apparent shift in position of an object when viewed from different perspectives. Arcsecond is a unit of angle that is equal to one sixtieth of an arcminute, or one three thousand six hundredth of a degree.
A parsec is defined as the distance at which one astronomical unit subtends an angle of one arcsecond. In other words, it is the distance from which the Earth-Sun distance would appear as one arcsecond on the sky. This can be illustrated by an imaginary right triangle, where the adjacent side is one au, the opposite side is one parsec, and the angle opposite to the parsec side is one arcsecond.
History of the parsec
The concept of the parsec was first proposed by the British astronomer Herbert Hall Turner in 1913, as a convenient unit for expressing stellar distances. He coined the term by blending “parallax” and “second”. He also suggested using the symbol “pc” for parsec.
The first measurement of a stellar parallax was made by Friedrich Bessel in 1838, for the star 61 Cygni. He found that the star had a parallax of 0.314 arcseconds, which corresponds to a distance of about 10.4 parsecs. Since then, many more stars have been measured for their parallaxes, using various methods such as telescopes, satellites and interferometers.
The parsec is now widely used in astronomy and astrophysics, especially for objects within and around the Milky Way galaxy. For more distant objects, such as galaxies and quasars, larger units such as kiloparsecs (kpc), megaparsecs (Mpc) and gigaparsecs (Gpc) are used.
How to convert parsec
To convert parsecs to other units of length, we can use the following conversion factors:
To convert other units of length to parsecs, we can use the inverse of these conversion factors:
Where parsec is used
The parsec is mainly used in astronomy and astrophysics, as it is a convenient unit for expressing distances between stars and other celestial objects. For example:
The parsec can also be used in other fields that deal with large distances or angles, such as geodesy, navigation and surveying.
Example conversions of parsec to other units
Here are some examples of converting parsecs to other units of length:
To convert one parsec to meters, we multiply by the conversion factor:
1 pc × 3.0857 × 10^16 m/pc = 3.0857 × 10^16 m
To convert 10 parsecs to miles, we multiply by the conversion factor:
10 pc × 1.9174 × 10^13 mi/pc = 1.9174 × 10^14 mi
To convert 0.01 parsecs to astronomical units, we multiply by the conversion factor:
0.01 pc × 2.06265 × 10^5 au/pc = 2.06265 × 10^3 au
To convert 100 parsecs to light-years, we multiply by the conversion factor:
100 pc × 3.26156 ly/pc = 326.156 ly
To convert one meter to parsecs, we divide by the conversion factor:
1 m / (3.0857 × 10^16 m/pc) = 3.24078 × 10^-17 pc
To convert one mile to parsecs, we divide by the conversion factor:
1 mi / (1.9174 × 10^13 mi/pc) = 5.21553 × 10^-14 pc
To convert one astronomical unit to parsecs, we divide by the conversion factor:
1 au / (2.06265 × 10^5 au/pc) = 4.84814 × 10^-6 pc
To convert one light-year to parsecs, we divide by the conversion factor:
1 ly / (3.26156 ly/pc) = 0.306601 pc
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