The year used by the International Astronomical Union is 365.25 days. A light year is the distance that light travels in one year. Symbols, abbreviations, or full names for units of length,Īrea, mass, pressure, and other types. Enter the number of light years to convert into parsecs. You can find metric conversion tables for SI units, as wellĪs English units, currency, and other data. Using the Earth’s orbit as a baseline, the distance (in parsecs) to a star can be calculated using: where p is measured in arcseconds. A parsec is equal to 3.26 light years and because a light. The parsec was defined to be the distance at which 1 AU (perpendicular to the line of sight) subtends an angle of 1 arcsecond: 1 parsec ( pc) distance d when angle is 1 arcsecond 3.086 1013 km 3.26 ly. It stands for "parallax of one arc second", and is approximately 19,131,554,073,600 (19 trillion) miles.Ĭonversion calculator for all types of measurement units. One parsec is defined as the distance to an object whose parallax angle is equal to one arcsecond. The parsec (symbol pc) is a unit of length used in astronomy. 1 Light years 0.3066 Parsec: 10 Light years 3.0659 Parsec: 2500 Light years 766.49 Parsec: 2 Light years 0.6132 Parsec: 20 Light years 6.1319 Parsec: 5000 Light years 1532.97 Parsec: 3 Light years 0.9198 Parsec: 30 Light years 9.1978 Parsec: 10000 Light years 3065.95 Parsec: 4 Light years 1.2264 Parsec: 40 Light years 12. The definition of a parsec is as follows: The light-year is a unit of length used to express astronomical. Most of the stars visible to the unaided eye in the night sky are within 500 parsecs of the Sun. The nearest star, Proxima Centauri, is about 1.3 parsecs (4.2 light-years) from the Sun. The SI prefix "mega" represents a factor of One parsec is equal to about 3.26 light-years (30 trillion km or 19 trillion miles) in length. It is exactly 648,000/ astronomical units, or approximately 30.9 trillion kilometers. A parsec is a unit of distance used in astronomy. Megalight-years are typically used to measure distances between neighboring galaxies and galaxy clusters. How many light years are in a parsec Easy pc to light years conversion. Solution: Formula: ly / 3.261563 pc Calculation: 5 ly / 3.2616 1.533007 pc End result: 5 ly is equal to 1. Sample task: convert 5 light years to parsecs. See the detailed calculation example below. One megalight-year, abbreviated "Mly", is one million light-years, or 306,601 parsecs. Simply divide the measure in light years by 3.26 to get the equivalent in parsecs. Megaparsec to Mly, or enter any two units below: Enter two units to convert From: Example of parsec (pc) to light years (ly) conversion: Problem: Convert 56 pc to ly Solution: Step 1 (Formula): ly pc 3.2616 Step 2 (Put the Values): ly 56 3. Astronomers tend to use parsecs more often than light-years generally, though. To get the Light Years, multiply the number of Parsecs by 3.3. Symbols, abbreviations, or full names for units of length,Īrea, mass, pressure, and other types.You can do the reverse unit conversion from 1022 km 3.1 1025 m Notice that a parsec is about 3.26 light-years. Quick Reference for Converting Parsecs to Light Years. More specifically, a light year is defined as the distance that a photon would travel, in free space and infinitely far away from any gravitational or magnetic fields, in one Julian year (365.25 days of 86400 seconds each).Ĭonversion calculator for all types of measurement units. It stands for "parallax of one arc second", and is approximately 19,131,554,073,600 (19 trillion) miles.Ī light year, abbreviated ly, is the distance light travels in one year: roughly 9.46 × 1012 kilometres (9.46 petametres, or about 5.88 × 1012 (nearly six trillion) miles). Solution: Formula: pc 3.261563 ly Calculation: 2 pc 3.2616 6.523126 ly End result: 2 pc is equal to 6.523126 ly pc to ly conversion table References 1 NIST Special Publication 330 (2008) - 'The International System of Units (SI)', edited by Barry N.Taylor and Ambler Thompson 2 International Organization for Standardization (1993). The parsec (symbol pc) is a unit of length used in astronomy. Light years to parsecs, or enter any two units below: Enter two units to convert From: You can do the reverse unit conversion from
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