Gliese 581 e
EXOPLANET · the featherweight
When discovered in 2009, this was the lightest planet ever found around a normal star, only about 1.7 Earth masses. It hugs its red sun far too closely for life, but it proved that our instruments had become sensitive enough to find truly small worlds, the kind that might one day include a real second Earth.
🚀 Fly there in the 3D universe