Convert Parsecs to Gigaparsecs
Convert Parsecs (pc) to Gigaparsecs (Gpc) instantly and accurately.
Conversion Formula
Gpc = pc × 1.000000000e-9
About Parsecs
A parsec (pc) is approximately 3.26 light years or 30.86 trillion kilometers, defined as the distance at which one astronomical unit subtends an angle of one arcsecond. Despite being less familiar than light years, parsecs are preferred by professional astronomers because they relate directly to stellar parallax measurements - the apparent shift in a star's position as Earth orbits the Sun. Most nearby stars are within a few dozen parsecs, our galaxy is about 30,000 parsecs across, and distant galaxies are measured in millions of parsecs (megaparsecs).
About Gigaparsecs
A gigaparsec (Gpc) is one billion parsecs or 3.26 billion light years, used for measuring the largest structures in the cosmos. The observable universe has a radius of about 14.3 gigaparsecs (46 billion light years when accounting for expansion). Superclusters and cosmic filaments, the largest known structures, span hundreds of megaparsecs to gigaparsecs. The cosmic microwave background radiation originates from a distance of about 14 gigaparsecs. This unit helps cosmologists map the large-scale structure of the universe and understand its evolution since the Big Bang.
Quick Reference Table
| Parsecs (pc) | Gigaparsecs (Gpc) |
|---|---|
| 1 pc | 1 × 10-9 Gpc |
| 2 pc | 2 × 10-9 Gpc |
| 5 pc | 5 × 10-9 Gpc |
| 10 pc | 1 × 10-8 Gpc |
| 25 pc | 2.5 × 10-8 Gpc |
| 50 pc | 5 × 10-8 Gpc |
| 100 pc | 1 × 10-7 Gpc |