The concept of using petameters (Pm) instead of light years (ly) or parsecs (pc) as units of astronomical distance is not commonly used because it is not as practical or widely recognized within the scientific community. Here are a few reasons why petameters are not commonly employed in astrophysics:
- Familiarity and Tradition: Light years and parsecs have been widely used for decades, and scientists and astronomers are accustomed to working