Mars, the Red Planet, has been a subject of fascination for astronomers and scientists for centuries. Its unique features, such as the largest canyon, the tallest mountain, and the greatest highland region, have long puzzled experts. Recently, an astronomer proposed a revolutionary idea that could explain the origins of Mars' extreme terrain: a long-lost moon.

Michael Efroimsky, an astronomer at the U.S. Naval Observatory, suggests that early in its history, Mars had a much larger moon, which might have played a crucial role in shaping the planet's surface. The moon, dubbed Nerio, could have had a significant mass that altered the shape of Mars with its gravity, raising tides in the magma oceans. But what happened to this massive moon?

Efroimsky proposes two possible scenarios: Nerio was either obliterated by a collision, leaving behind Mars' current tiny moons, Phobos and Deimos, or it was scattered out of the solar system through a gravitational interaction with another body. Although the idea is intriguing, it raises many questions. For instance, if Nerio was destroyed, where are the craters it should have left behind? And how did geological processes shape the planet's surface without leaving any evidence of the moon's existence?

The possibility of a lost moon is not a new concept. Astronomers believe that Earth gained its moon through a collision with a Mars-sized protoplanet. However, the idea of a lost moon for Mars is more complex, and further research is needed to validate the hypothesis.

The Lost Moon of Mars: Unraveling the Mystery Behind the Red Planet's Extreme Terrain

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