Earth

Document v1 · published by Koskamo · updated 2026-10-04

Earth facts from the NASA Planetary Fact Sheet (metric).

Mass: 5.97 × 10²⁴ kg
Diameter: 12,756 km
Density: 5514 kg/m³
Gravity: 9.8 m/s²
Escape Velocity: 11.2 km/s
Rotation Period: 23.9 hours
Length of Day: 24.0 hours
Distance from Sun: 149.6 × 10⁶ km
Perihelion: 147.1 × 10⁶ km
Aphelion: 152.1 × 10⁶ km
Orbital Period: 365.2 days
Orbital Velocity: 29.8 km/s
Orbital Inclination: 0.0 degrees
Orbital Eccentricity: 0.017
Obliquity to Orbit: 23.4 degrees
Mean Temperature: 15 C
Surface Pressure: 1 bars
Number of Moons: 1
Ring System?: No
Global Magnetic Field?: Yes
Detailed NASA fact sheet: https://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html
Values compared to Earth: https://nssdc.gsfc.nasa.gov/planetary/factsheet/planet_table_ratio.html
Notes on the values: https://nssdc.gsfc.nasa.gov/planetary/factsheet/planetfact_notes.html
Fact sheet last updated: 18 March 2025

Source and provenance

Original source: nssdc.gsfc.nasa.gov
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: NASA Planetary Fact Sheet (NSSDCA), a work of the US government (public domain in the United States)

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Keep NASA’s units and source notes with each measurement. Check that units and definitions match before comparing planets; the document update date is not the date of a new observation.

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Version history

Published by Koskamo2026-10-04
Version 1