NEWSNATIONNOW (Zach Kaplan) - Researchers identify 'Mega-Earth,' prompting questions of how it formed
The exoplanet is 170 million years old and weighs more than 23 times Earth's mass while being just 2 1/2 times its size.
The exoplanet is 170 million years old and weighs more than 23 times Earth's mass while being just 2 1/2 times its size.