Light Year (ly)
Definition: A light-year (ly) is the distance light travels in one Julian year (365.25 days), approximately 9.461 trillion kilometers or 5.878 trillion miles. It is used for measuring astronomical distances.
History: The term 'light-year' was first introduced in the 19th century to help astronomers express cosmic distances. It replaced astronomical units that were cumbersome for measuring vast space distances.
Current Use: Light-years are used in astronomy to describe distances between stars, galaxies, and other celestial objects. It is crucial for understanding the scale of the universe and cosmic events.
Meter (m)
Definition: The meter (m) is the base unit of length in the International System of Units (SI), defined by the speed of light in a vacuum. One meter is the distance light travels in 1/299,792,458 of a second.
History: The meter was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole. It has since been redefined multiple times, most recently in 1983 using the speed of light.
Current Use: The meter is universally used in science, engineering, and daily life for measuring objects, distances, and heights. It is the foundation of the metric system and adopted by nearly every country worldwide.
Quick Conversion Table Light Year (ly) to Meter (m)
1 Light Year (ly) equal to 9.46053e+15 Meter (m)
5 Light Year (ly) equal to 4.73026e+16 Meter (m)
10 Light Year (ly) equal to 9.46053e+16 Meter (m)
20 Light Year (ly) equal to 1.89211e+17 Meter (m)
30 Light Year (ly) equal to 2.83816e+17 Meter (m)
50 Light Year (ly) equal to 4.73026e+17 Meter (m)
75 Light Year (ly) equal to 7.09540e+17 Meter (m)
100 Light Year (ly) equal to 9.46053e+17 Meter (m)