Astronomers find an ultra-dense mega-Earth 23 times our planet’s mass but only 2.5 times its size
GJ 523b is 2.55 times Earth’s radius but about 23.5 times its mass, making it unusually dense for…
Astronomers Find Potentially Habitable Super-Earth Just 25 Light-Years Away
Astronomers have discovered a rocky exoplanet about twice Earth’s size just 25 light-years away, orbiting in the habitable…