Mars Earth's planetary neighbor Mars has been associated with the color red for centuries. (more) Why is Mars Called the Red Planet? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/Why-is-Mars-Called-the-Red-Planet Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction Additional Information Other Your Feedback Submit Feedback Thank you for your feedback Our editors will review what you’ve submitted and determine whether to revise the article.

　　External Websites Ask the Chatbot a Question Written and fact-checked by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors. The Editors of Encyclopaedia Britannica Last Updated: Mar 4, 2025 • Article History Table of Contents Table of Contents Ask the Chatbot The distinct reddish color of Mars is primarily due to the presence of iron oxide (commonly called “rust”) in the dust and rocks that cover the planet’s surface. Mars has been associated with the color red for centuries. In various historical cultures and mythologies, Mars has been linked to death, disease, and fear. For instance, ancient Babylonian astronomers called the planet Nergal, after their god of death and pestilence, due to its blood-like color. Similarly, the Romans named it after their god of war, Mars, associating the reddish color with blood and warfare. These historical associations have contributed to the ...(100 of 153 words)

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