# Data source

NASA, Planet Sizes and Locations in Our Solar System
https://science.nasa.gov/solar-system/planet-sizes-and-locations-in-our-solar-system/
Published April 22, 2025; retrieved September 29, 2026.

planets.csv manually transcribes the article's rounded equatorial diameters in kilometers for Mercury, Venus, Earth and Mars. This is not an official NASA CSV download. Do not substitute mean diameters, radii or different measurements. No NASA imagery or logos are needed.