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People_of_Space: Twitter ನಲ್ಲಿ: "With a radius of 3,390 kilometers, Mars is about half the size of Earth. (NASA) https://t.co/lvZIKeBO6S" / Twitter
File:Mars, Earth size comparison.jpg - Wikimedia Commons
In Depth | Mars – NASA Solar System Exploration
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UZH - UZH News - Advancing to the core thanks to marsquakes
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As well as facts relating to mars size hi-res stock photography and images - Alamy
Astronomy - Ch. 12: Mars (5 of 25) Size Comparison - YouTube
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Mars | Facts, Surface, Moons, Temperature, & Atmosphere | Britannica
Mars - Wikipedia
Mars -- a nice place to visit?
