"New Horizons Discovers Heart-Shaped Glacier on Pluto"
NASA's New Horizons spacecraft captured a stunning image of a heart-shaped glacier on Pluto's surface, known as Tombaugh Regio, made of nitrogen and methane. The spacecraft reached Pluto in 2015, becoming the first probe to fly by Pluto and its moons. Pluto was once considered the ninth planet in the solar system but was reclassified as a dwarf planet in 2006. Its surface is coated in ice made of water, methane, and nitrogen and is believed to have a rocky core and possibly a deep ocean.