NASA announced on Monday that it has added the 5,000th alien world to its Exoplanet Archive marking a big milestone for planetary science. “The 5,000-plus planets found so far include small, rocky worlds like Earth, gas giants many times larger than Jupiter, and ‘hot Jupiters’ in scorchingly close orbits around their stars,” officials at NASA’s […] Read the full story on GreekReporter.com.