space Pluto's Famous Heart Feature Formed by Celestial Collision, Study Reveals Pluto's heart, distinguished by its bright, nitrogen-ice covered surface, first captured public and scientific interest when NASA's New Horizons spacecraft sent back detailed images in 2015.
space Scientists Propose to Make Pluto a Planet Again If the approach to defining planets is reconsidered, the status of a planet would be given not only to Pluto, but also to the Moon, dwarf planets, asteroids, as well as geologically active satellites of giant planets, such as Titan.
