Scientists have uncovered a new "mega-Earth" in extrasolar space, an unusually dense, rocky exoplanet. Exoplanet GJ 523b, located beyond our solar system, is 2.5 times Earth's width and holds 23 times ...
new video loaded: NASA says new Earth-like planet discovered transcript Scientists using NASA's powerful Kepler telescope have found a planet beyond the solar system that is similar to Earth. Rough ...
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