The Earth-Twin Planet That Nobody Talks About

Same size, orbits a similar star ...

Out There iconOut There
By Corey S. Powell
Oct 1, 2015 3:59 AMApr 18, 2020 7:14 PM
Venus via Magellan - NASA
A colorized radar map of the Maat Mons volcano on Venus, shows lava flows of unknown age, along with an apparent impact crater in the foreground. This image, created more than two decades ago by NASA's Magellan spacecraft, still represented the state of the art in our knowledge of Earth's near-twin. (Credit: NASA/JPL)

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NASA scientists were conferring today about a nearby planet that is shockingly similar to Earth. It is just 5% smaller in radius and 15% smaller in mass. It is almost the exact same age as our planet, and gets its warmth from an identical star. The only thing that’s a bit off is that it orbits a bit closer to its star than Earth does, so it receives nearly twice as much radiation. On the other, it also reflects away a lot of that radiation. Its theoretical (equilibrium) temperature is just below freezing, so with a little natural greenhouse warming it would be quite an inviting place.

If we found it orbiting another star, this world would surely be hailed as the most Earthlike exoplanet known: the best place yet to search for alien life.

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