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.
Exameter (Em)
Definition: An exameter (Em) is a unit of length equal to 10^18 meters. It is used primarily in theoretical physics and astronomy for describing vast cosmic distances.
History: As the metric system expanded, large-scale units like the exameter were introduced to accommodate astronomical and scientific measurements requiring extremely large distances.
Current Use: Exameters are rarely used in everyday applications but appear in astrophysics when discussing interstellar distances, black hole measurements, and the size of cosmic structures.
Quick Conversion Table Light Year (ly) to Exameter (Em)
1 Light Year (ly) equal to 0.009460528 Exameter (Em)
5 Light Year (ly) equal to 0.047302642 Exameter (Em)
10 Light Year (ly) equal to 0.094605284 Exameter (Em)
20 Light Year (ly) equal to 0.189210568 Exameter (Em)
30 Light Year (ly) equal to 0.283815852 Exameter (Em)
50 Light Year (ly) equal to 0.47302642 Exameter (Em)
75 Light Year (ly) equal to 0.70953963 Exameter (Em)
100 Light Year (ly) equal to 0.94605284 Exameter (Em)