

Convert Feet to Lightyears (ft to ly) ▶ Conversion Table
How to convert1 lightyear (ly) = 3.10385E+16 foot (ft). Lightyear (ly) is a unit of Length used in Metric system. Foot (ft) is a unit of Length used in Standard system. Lightyear: A Unit of LengthThe lightyear is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (9.46 × 10^^{12} km), or 5.88 trillion miles (5.88 × 10^^{12} mi). As defined by the International Astronomical Union (IAU), a lightyear is the distance that light travels in a vacuum in one Julian year (365.25 days). The lightyear is most often used when expressing distances to stars and other distances on a galactic scale, especially in nonspecialist contexts and popular science publications. In this article, we will explore the definition, history, usage and conversion of the lightyear as a unit of length. Definition of the LightyearThe lightyear is a unit of length that is equal to the product of the Julian year and the speed of light. The Julian year is a unit of time that is equal to 365.25 days or 31,557,600 seconds. The speed of light is a physical constant that is defined as 299,792,458 meters per second. The symbol for lightyear is ly. The definition of the lightyear can be derived from the following formula: 1 ly = 1 Julian year × speed of light 1 ly = 31,557,600 s × 299,792,458 m/s 1 ly = 9,460,730,472,580,800 m 1 ly = 9.46 × 10^^{15} m History of the LightyearThe concept of the lightyear as a unit of distance was first proposed by the German astronomer Friedrich Wilhelm Bessel in 1838. He used it to estimate the distance to some nearby stars based on their parallax measurements. Parallax is the apparent shift in position of an object when viewed from different angles. Bessel calculated that the star 61 Cygni was about 10.3 lightyears away from Earth. The term lightyear was popularized by the British astronomer James Bradley in his book Stellar Movements and the Structure of the Universe (1918). He used it to describe the distances to various stars and galaxies. He also introduced the term parsec as another unit of distance based on parallax. The lightyear was officially recognized by the IAU in 1976 as part of its System of Astronomical Constants. Usage of the LightyearThe lightyear is a unit of length that is used for measuring astronomical distances that are too large to be expressed in other units such as kilometers or astronomical units (AU). An AU is equal to about 150 million kilometers or 93 million miles and is roughly the distance from Earth to the Sun. The lightyear is commonly used in astronomy and cosmology to describe the distances to stars, galaxies, nebulae and other celestial objects. For example:
The lightyear can also be used to measure time intervals in cosmology by relating them to distances traveled by light. For example:
Example Conversions of Lightyear to Other UnitsThe lightyear can be converted to other units of length by using different factors and formulas. Here are some examples of conversion for different types of units:
1 ly × 9.46 × 10^^{12} = 9.46 × 10^^{12} km
1 ly × 5.88 × 10^^{12} = 5.88 × 10^^{12} mi
1 ly × 63,241 = 63,241 AU
1 ly / 3.26 = 0.31 pc
1 km / 9.46 × 10^12 = 1.06 × 10^^{13} ly
1 mi / 5.88 × 10^12 = 1.70 × 10^^{13} ly
1 AU / 63,241 = 1.58 × 10^^{5} ly
1 pc × 3.26 = 3.26 ly Foot: A Unit of Length Used in the US Customary SystemThe foot (ft) 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 foot is equal to 12 inches or 0.3048 meter. The foot 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 foot is ft or ′. The foot is used for measuring short distances and dimensions, such as the height of a person or the width of a door. The foot is named after the human foot, which was used as a standard of measurement in ancient times. In this article, we will explore the definition, history, usage and conversion of the foot as a unit of length. Definition of FootThe foot is a unit of length that is equal to 12 inches. It is defined as 0.3048 meter by international agreement in 1959. One inch is equal to 25.4 millimeters. The definition of the foot has changed over time, as different standards and methods of measurement were developed by various countries and organizations. The current definition of the foot as based on the meter was agreed upon by an international treaty in 1959. History of FootThe origin of the foot 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 foot comes from the Old English word fot, which was derived from the ProtoGermanic word fotuz. It referred to the length of a human foot, which was about 280 millimeters. The foot was also used as a measure of length by other civilizations, such as the Romans, who used it as onesixteenth of a Roman pace or passus. The Roman foot was about 296 millimeters. The foot 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 foot remained as a derived unit in the imperial system, but it was no longer recommended for use in scientific and technical fields. Where Foot is UsedThe foot is a unit of length that is used for measuring short distances and dimensions, such as the height of a person or the width of a door. The foot is commonly used in everyday life, especially in countries that follow the US customary system. Some examples are:
Foot Equivalents in Other Units and ScalesThe foot (ft) 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 foot is equal to 12 inches or 0.3048 meter. The foot 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 foot is ft or ′. The foot is used for measuring short distances and dimensions, such as the height of a person or the width of a door. The foot is named after the human foot, which was used as a standard of measurement in ancient times. In this article, we will explore how to convert foot to other units of length in the US customary system and the SI system. We will also provide 10 examples of conversion for each system. How to Convert Foot to Other Units of Length in the US Customary SystemThe US customary system is a system of measurement that uses units such as inch, yard, mile, ounce, pound, gallon, etc. The US customary system is based on the English system of measurement that was used before the adoption of the metric system. To convert foot to other units of length in the US customary system, we need to know the relationship between foot and other units. Here are some common units and their equivalent values in feet: To convert foot to any of these units, we need to multiply or divide by the appropriate factor. For example, to convert 10 feet to inches, we need to multiply by 12: 10 feet x 12 = 120 inches To convert 10 feet to miles, we need to divide by 5280: 10 feet / 5280 = 0.00189 miles To convert 10 feet to fathoms, we need to divide by 6: 10 feet / 6 = 1.667 fathoms To convert 10 feet to rods, we need to divide by 16.5: 10 feet / 16.5 = 0.606 rods How to Convert Foot to Other Units of Length in the SI SystemThe SI system (or International System of Units) is a system of measurement that uses units such as meter, kilogram, second, ampere, kelvin, mole, candela, etc. The SI system is based on the metric system that was developed in France in the late 18th century. To convert foot to other units of length in the SI system, we need to know the relationship between foot and meter. The meter is the base unit of length in the SI system and it is defined as “the length of the path travelled by light in vacuum during a time interval of 1/299792458 seconds.” One foot is equal to 0.3048 meters. To convert foot 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 meters: To convert foot to any of these units, we need to multiply by the appropriate factor and add a prefix. Español Russian Français 
Feet to Centimeters Feet to Decimeters Feet to Inches Feet to Kilometers Feet to Meters Feet to Miles Feet to Millimeters Feet to Yards Centimeters to Inches Feet to Inches Feet to Kilometers Feet to Meters Feet to Yards Inches to Centimeters Inches to Feet Inches to Meters Inches to Millimeters Kilometers to Miles Meters to Feet Meters to Inches Meters to Yards Miles to Kilometers Millimeters to Inches Yards to Feet Yards to Inches Yards to Meters 
About Us Contact Terms of Service 