Petameter (Pm)
Definition: A petameter (Pm) is a unit of length equal to 10^15 meters, used for measuring large cosmic distances such as the size of galaxies and nebulae.
History: The petameter was introduced to simplify extremely large measurements in astronomy, allowing researchers to express vast distances in a comprehensible unit.
Current Use: Petameters are used in astrophysics when discussing galaxy clusters, intergalactic distances, and space phenomena on an enormous scale.
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.
Quick Conversion Table Petameter (Pm) to Light Year (ly)
1 Petameter (Pm) equal to 0.105702341 Light Year (ly)
5 Petameter (Pm) equal to 0.528511706 Light Year (ly)
10 Petameter (Pm) equal to 1.0570234 Light Year (ly)
20 Petameter (Pm) equal to 2.1140468 Light Year (ly)
30 Petameter (Pm) equal to 3.1710702 Light Year (ly)
50 Petameter (Pm) equal to 5.2851171 Light Year (ly)
75 Petameter (Pm) equal to 7.9276756 Light Year (ly)
100 Petameter (Pm) equal to 10.5702341 Light Year (ly)