Convert Megaparsecs to Gigaparsecs
Convert Megaparsecs (Mpc) to Gigaparsecs (Gpc) instantly and accurately.
Conversion Formula
Gpc = Mpc × 0.001
About Megaparsecs
A megaparsec (Mpc) is one million parsecs or 3.26 million light years, the standard unit for measuring intergalactic distances. The Andromeda Galaxy is about 0.77 megaparsecs away, while most galaxies in the observable universe are measured in megaparsecs. The Local Group of galaxies spans about 3 megaparsecs. Astronomers use megaparsecs in combination with redshift measurements to calculate distances to distant galaxies and study the expansion of the universe. The Hubble constant, describing cosmic expansion, is expressed in kilometers per second per megaparsec.
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
| Megaparsecs (Mpc) | Gigaparsecs (Gpc) |
|---|---|
| 1 Mpc | 0.001 Gpc |
| 2 Mpc | 0.002 Gpc |
| 5 Mpc | 0.005 Gpc |
| 10 Mpc | 0.01 Gpc |
| 25 Mpc | 0.025 Gpc |
| 50 Mpc | 0.05 Gpc |
| 100 Mpc | 0.1 Gpc |