Celestial Objects

Mercury

Citation Formats

General Reference

Space and Astronomy Atlas. "Mercury." Accessed August 30, 2026. https://space.interactiveatlas.org/celestial-objects/mercury-planet.

APA Style

Space and Astronomy Atlas. (n.d.). Mercury. Retrieved August 30, 2026, from https://space.interactiveatlas.org/celestial-objects/mercury-planet

BibTeX

@misc{spaceandastronomyatlas-mercury,
  author = {Space and Astronomy Atlas},
  title = {Mercury},
  year = {2026},
  url = {https://space.interactiveatlas.org/celestial-objects/mercury-planet},
  note = {Accessed August 30, 2026}
}

The smallest and innermost planet of the solar system, closest to the Sun, with almost no atmosphere and the most extreme temperature swings of any planet, from over 400 degrees Celsius by day to well below freezing at night.

Facts

Object Type

Terrestrial planet 1

Diameter (km)

4879 1

Mass

3.30 x 10^23 kg 1

Orbital Distance

0.39 AU (about 58 million km) from the Sun 1

Sources

1. NASA Solar System Exploration

National Aeronautics and Space Administration

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